One part of a bottle of beer? (3)
I believe the answer is:
ale
'beer?' is the definition.
(type of beer)
'one part of a bottle' is the wordplay.
'one' becomes 'a' (a thing is one thing).
'part of a bottle' becomes 'le' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'a'+'le'='ALE'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for ale that I've seen before include "Beerlike beverage" , "Stout" , "Alcohol" , "Traditional beer" , "Alcoholic beverage" .)