Crossword Genius

Dry form of humour gets her (6)

Ross

I believe the answer is:

wither

'dry' is the definition.
(thesaurus)

'form of humour gets her' is the wordplay.
'form of humour' becomes 'wit' (I've seen this before).
'gets' is a charade indicator (letters next to each other).
'wit'+'her'='WITHER'

(Other definitions for wither that I've seen before include "Dry up and perish" , "Shrivel and decay" , "Droop, shrivel" , "Shrink, shrivel up" , "Shrivel away" .)

I've seen this clue in The Globe and Mail.
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