Crossword Genius

Limp through small deficiency (5)

Ross

I believe the answer is:

slack

'limp' is the definition.
(thesaurus)

'small deficiency' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'deficiency' becomes 'lack' (synonyms).
's'+'lack'='SLACK'

'through' is the link.

(Other definitions for slack that I've seen before include "Flaccid" , "Limp - negligent" , "Lazy and careless" , "Not taut" , "coal dust" .)

I've seen this clue in The Telegraph.
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