Enough, sufficient (8)
I believe the answer is:
adequate
This clue is a double definition.
'enough' is the first definition.
(synonyms)
'sufficient' is the second definition.
(similar in meaning)
(Other definitions for adequate that I've seen before include "'Good enough, all right (8)'" , "up to the job?" , "Just about sufficient, acceptable" , "Sufficient or all right" , "Passable; enough" .)