Small number clothing small honey (7)
I believe the answer is:
sweeten
'honey' is the definition.
(thesaurus)
'small number clothing small' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'number' becomes 'ten' (ten is a kind of number).
'clothing' is an insertion indicator.
'small' becomes 'wee' ('wee' can be similar in meaning to 'small'**).
's'+'ten'='sten'
'sten' going around 'wee' is 'SWEETEN'.
(Other definitions for sweeten that I've seen before include "temper" , "Make saccharine or honeyed" , "Seen wet (anag.)" , "Make fresh" , "Make less bitter" .)