Delivered beer intended for infirmity (7)
I believe the answer is:
ailment
'infirmity' is the definition.
(I've seen this before)
'delivered beer intended' is the wordplay.
'delivered' indicates a 'sounds like' (homophone) clue (delivered verbally).
'beer' becomes 'ale' (type of beer).
'intended' becomes 'ment' (I can't justify this - if you can you should believe this answer much more).
'ale' sounds like 'ail'.
'ail'+'ment'='AILMENT'
'for' is the link.
Can you help me to learn more?
(Other definitions for ailment that I've seen before include "I lament (anag.)" , "Slight but persistent illness" , "Minor illness" , "Malady" , "Physical disorder" .)