Small hint? Absolutely (6)
I believe the answer is:
simply
'absolutely' is the definition.
(thesaurus)
'small hint?' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'hint?' becomes 'imply' (hint can mean to imply or suggest).
's'+'imply'='SIMPLY'
(Other definitions for simply that I've seen before include "Without fuss" , "In a straightforward manner" , "Merely, just" .)