Nymph not serving alcohol, extremely awkard (5)
I believe the answer is:
dryad
'nymph' is the definition.
(dryad is a kind of nymph)
'not serving alcohol extremely awkard' is the wordplay.
'not serving alcohol' becomes 'dry' (dry can mean abstaining from drinking alcohol).
'extremely' means to remove the middle letters (only the extremes of the word are used).
'awkard' with its centre taken out is 'ad'.
'dry'+'ad'='DRYAD'
(Other definitions for dryad that I've seen before include "butterfly" , "Woodland deity" , "Beautiful young woman" , "Nymph of the woods" , "minor divinity" .)