Crossword Genius

Damp fog — nothing visible in that (5)

Ross

I believe the answer is:

moist

'damp' is the definition.
(synonyms)

'fog nothing visible in that' is the wordplay.
'fog' becomes 'mist' (mist is a kind of fog).
'nothing' becomes 'O' (looks like zero - 0).
'visible in that' means one lot of letters goes inside another.
'mist' placed around 'o' is 'MOIST'.

(Other definitions for moist that I've seen before include "Damp, humid" , "Damp or clammy" , "lubricated" , "bit wet" , "Dampish" .)

I've seen this clue in The Times.
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