Hint Tunisian criminal gave at last (9)
I believe the answer is:
insinuate
'hint' is the definition.
(I know that insinuate is a more specific form of the action hint)
'tunisian criminal gave at last' is the wordplay.
'criminal' indicates anagramming the letters.
'at last' suggests the final letters.
The final letter of 'gave' is 'e'.
'tunisian' anagrammed gives 'insinuat'.
'insinuat'+'e'='INSINUATE'
(Other definitions for insinuate that I've seen before include "Intimate, imply" , "Indirectly suggest (something unpleasant)" , "Intimate, give to understand" , "Subtly introduce" , "Snidely suggest" .)