One serving craft beers, perhaps (6,9)
I believe the answer is:
flight attendant
'one serving craft beers perhaps' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'one' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for flight attendant that I've seen is " help on lines".)