Fellow on the right will have chicken, but at what time? (4)
I believe the answer is:
when
'at what time?' is the definition.
(I've seen this in another clue)
'fellow on the right will have chicken' is the wordplay.
'fellow on the right will have' becomes 'w' (I am not sure about this - if you are sure you should believe this answer much more).
'chicken' becomes 'hen' (hen is a kind of chicken).
'w'+'hen'='WHEN'
'but' acts as a link.
Can you help me to learn more?
(Other definitions for when that I've seen before include "At what time?" , "As soon as" , "stop pouring the drink" , "Over what period?" , "Say it when you''ve had enough" .)