The best unable to produce striker? (9)
I believe the answer is:
matchless
'the best' is the definition.
(thesaurus)
'unable to produce striker?' is the wordplay.
I cannot really see how this works, but
'striker?' could be 'match' (a match can be struck) and 'match' is found within the answer.
The remaining letters 'less' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for matchless that I've seen before include "Unrivalled" , "beyond compare" , "Unique" , "Without peer, nonpariel" , "reason for rubbing sticks together?" .)