Swallow against birds flying west (7)
I believe the answer is:
consume
'swallow' is the definition.
(thesaurus)
'against birds flying west' is the wordplay.
I cannot really see how this works, but
'against' could be 'on' (I've seen this in other clues) and 'on' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for consume that I've seen before include "Exhaust" , "Eat, drink" , "Use up" , "Devour" .)