Overindulge bear, say (6)
I believe the answer is:
pander
'overindulge' is the definition.
'bear say' is the wordplay.
'bear' becomes 'panda'.
'say' shows a homophone (sound like).
'panda' sounds like 'PANDER'.
(Other definitions for pander that I've seen before include "Indulge or cater to" , "Gratify weakness like a pimp" , "Cater for vice or low tastes" , "Bow (to)" , "Give gratification (to)" .)