Happy to dine behind pub, perhaps? (6)
I believe the answer is:
upbeat
'happy' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I don't see?
'dine behind pub perhaps?' is the wordplay.
'dine' becomes 'eat' (eat a meal).
'behind' is a charade indicator (letters next to each other).
'perhaps?' indicates anagramming the letters (I've seen 'perhaps' mean this).
'pub' with letters rearranged gives 'upb'.
'eat' put after 'upb' is 'UPBEAT'.
'to' is the link.
Can you help me to learn more?
(Other definitions for upbeat that I've seen before include "Optimistic, positive" , "Of mood, cheerful and optimistic" , "Cheerfully optimistic" , "Heartening" , "Cheerful and sanguine - as in music?" .)