Resort to guessing for this hint (10)
I believe the answer is:
suggestion
'this hint' is the definition.
(synonyms)
'resort to guessing' is the wordplay.
'resort' indicates anagramming the letters.
'to'+'guessing'='toguessing'
'toguessing' with letters rearranged gives 'SUGGESTION'.
'for' is the link.
(Other definitions for suggestion that I've seen before include "one may be going to box?" , "Idea put forward for consideration" , "suspicion" , "Hint" , "Proposition" .)