Tea-time waffle? (4)
I believe the answer is:
chat
'waffle?' is the definition.
(I've seen this before)
'tea-time' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'time' becomes 't'.
'cha'+'t'='CHAT'
(Other definitions for chat that I've seen before include "Chew the fat" , "Talk familiarly" , "Chinwag" , "Talk casually" , "Gossip" .)