Like top kisser? Charlie excited on one date, finally has fiddle (6,3)
I believe the answer is:
cupids bow
'like top kisser?' is the definition.
(lips - 'kissers' - might look like Cupid's bow)
'on one date finally has fiddle' is the wordplay.
'on one date' becomes 'cupid' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'finally' indicates one should take the final letters.
'fiddle' becomes 'bow' (both can mean to play a violin).
The final letter of 'has' is 's'.
'cupid'+'s'+'bow'='CUPIDS BOW'
'charlie excited' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
(Other definitions for cupids bow that I've seen before include "Lover boy's weapon" , "(Poetically) the upper human lip" , "Shapely mouth" , "lip curl" , "Curvaceous lips" .)