Deceptively great in name, one serving drag performer? (9)
I believe the answer is:
cigarette
'one serving drag performer?' is the definition.
(as in taking a drag on a cigarette)
'deceptively great in name' is the wordplay.
'deceptively' indicates anagramming the letters (I've seen this in other clues).
'in' indicates putting letters inside.
'name' becomes 'cite' (I've seen this in other clues).
'great' is an anagram of 'garet'.
'garet' placed within 'cite' is 'CIGARETTE'.
(Other definitions for cigarette that I've seen before include "Tobacco wrapped in paper" , "harmful in nature" , "Cylinder of tobacco" , "Fag, smoke" , "Something smoked" .)