Papa feels bitter about hosts (8)
I believe the answer is:
presents
'hosts' is the definition.
'papa feels bitter' is the wordplay.
'papa' becomes 'P' (NATO / phonetic alphabet).
'feels bitter' becomes 'resents' (to feel resentful is to feel bitter).
'p'+'resents'='PRESENTS'
'about' is the link.
(Other definitions for presents that I've seen before include "Press ten (anag.)" , "donations" , "tips" , "Offerings" , "Introduces" .)