Where to find drink after spelling Eyjafjallajökull perhaps (6)
I believe the answer is:
spewer
'where to find drink' is the definition.
The definition suggests a singular noun which matches the answer.
'spelling eyjafjallajokull perhaps' is the wordplay.
I cannot really see how this works, but
'spelling' could be 'sp' (I've seen this in other clues) and 'sp' is found in the answer.
The remaining letters 'ewer' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'after' acts as a link.
Can you help me to learn more?
(Another definition for spewer that I've seen is " One brings".)