Call for a skill that's not bad (3)
I believe the answer is:
ask
'call for' is the definition.
(synonyms)
'a skill that's not bad' is the wordplay.
'that's not' suggests deleting specific letters (that has not).
'bad' becomes 'ill' (similar in meaning).
'skill' with 'ill' taken away is 'sk'.
'a'+'sk'='ASK'
(Other definitions for ask that I've seen before include "Enquire" , "Put a question" , "Request, invite" , "Make enquiry" , "Seek an answer" .)