Solving time, 17 mins
* = anagram
ACROSS
6 ENGLISH DISEASE (See his dealings)*
9 CHAR (LAD) Y
10 R (right) O (old) PIER
11 ORA C(L) E Last letter of oral in CE (Church of England)
12 (he) ARTLESS
13 DESMOND MORRIS (Dr so modernism)*
17 BURN IS H (hard – on pencils)
18 IN SITU (unit is)* from Latin
20 TA HIT I
21 AS PI RING
22 GO DOWN THE TUBES Double definition
DOWN
1 TE (THERE) D Ted = old rocker (Teddy Boy from the 1950s)
2 AGA RIC(e)
3 TIR (A D) E tire = weary (vb)
4 LIBRETTO (title bor)*
5 LEAP YEAR e (people ultimately = last letter) in (real pay)*
7 HAY (WARDS) HEATH in West Sussex
8 S (T = front of tongue i.e. first letter) EPS seps is a type of lizard
14 SER (VI) TOR VI = 6 in Roman numerals in (resort)* Archaic word, hence ‘old’ . Friendly wordplay for the unfamiliar word
15 O (PINION) S Ordinary Seaman
16 SATANISTS (at saints)*
17 BR (A V) O very little = v
18 IM PUT E E = second (letter) in test definition = credit
19 Wormwood SCRUBS 9 is ‘charlady’