A Process of Induction by Emkay

Puzzle explanation

The theme was indicated by the central character, the American physicist Joseph Henry at 24ac. Henry gave his name to the unit of “inductance” (or induction), as suggested in the title. All the perimeter characters, clued without definition in the order Ford, Irving, Hall, Wood, Mancini, Purcell, the Eighth and Thierry, had Henry as either their first name or surname. Answers jumbled on entry were Across: 6 drongos 10 causes 20 cleaner 22 peeler 25 goglet 29 freshly 42 groset 43 truster; Down: 1 goa 2 derm 4 gee 5 orra 36 vote 37 crag 39 pie 41 ree.

Clue explanations

Conventions: * = anagram, < = reversal

No Answer Explanation
Perimeter
  FORD FOR + D
  IRVING VIRGIN *
  HALL HALL(oumi)
  WOOD WOODPECKER – PECKER
  MANCINI (I’ + NI) after (M + ANC)
  PURCELL PUR(e) + CELL
  THE EIGHTH (TIGHT + H) about (HE about E)
  THIERRY THE about I + R + RY; Thierry Henry: French international soccer player
Across
6 DRONGOS DROS(s) about NOG *
10 CAUSES CASES about U
13 CATER TRACE *
14 RAGTOP RAG + TOP
15 CHROMOSPHERIC R in (C + H + O + Mo + S + P + H + Er + I + C)
16 RONDO OND in RO
18 ELDEST ELD + EST
20 CLEANER LAWRENCE * – W
22 PEELER Two definitions
25 GOGLET GOT about (G + L(arg)E)
29 FRESHLY FLY-FISHER * – I – F(lounder)
33 ANTRES Hidden, subject and object reversed
34 ESTRO (POET – P + R + ’S) *
35 AUTHENTICATOR (CAUTION + THREAT) *
38 DEEPEN PEN after (on) DEE
40 RATES RAVES, V changed to T
42 GROSET GROS + ET
43 TRUSTER (T’ + R + T’ + ER) about US
Down
1 GOA GOAT – T’
2 DERM D + ERMINE – I(mplements) – N(ot) – E(xciting)
3 HORSE CHESTNUT HORSE + CHESTNUT
4 GEE EG < + E
5 ORRA Hidden, reversed
7 OCHRE CH in ORE
8 STONE COUNT SET * – CUT *
9 DROOL DR + O + O’ + L
10 CAPLE MAPLE with C(ut) for M’
11 STEER ’S + T’ + E + E + R
12 SPITE SPIKE, T for K
17 DREG DREDGE – second D, E
19 SPRY OSPREY – O – E
21 NOON (O’ + O) in (N + N)
23 EELS Every fourth letter
26 GAUDS GAS about (U +D)
27 ETHER THE in ER; Emergency Room is the US equivalent of the UK’s Accident & Emergency
28 TENET Palindrome
30 HEIRS Homophone (AIRS)
31 STATE DEVASTATE – DEVA
32 ROOST R + O’ + O + ST
36 VOTE EVICT ONE * – NICE
37 CRAG Hidden, reversed
39 PIE PIECE – CE
41 REE FEER < – F(ascination)
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