Feebly, say, but regularly (6)
I believe the answer is:
weekly
'regularly' is the definition.
Both the answer and definition are adverbs. Perhaps they are linked in a way I don't understand?
'feebly say' is the wordplay.
'feebly' becomes 'weakly' (I've seen this before).
'say' shows a homophone (sound like).
'weakly' sounds like 'WEEKLY'.
'but' is the link.
Can you help me to learn more?
(Other definitions for weekly that I've seen before include "Hebdomadal" , "Periodical" , "52 times a year" , "Regular publication" , "magazine" .)