Eat, tongue in cheek by the sound of it? (6)
I believe the answer is:
ingest
'eat' is the definition.
(thesaurus)
'tongue in cheek by the sound of it?' is the wordplay.
'tongue in cheek' becomes 'injest'.
'by the sound of it?' shows a homophone (sound like).
'injest' sounds like 'INGEST'.
(Other definitions for ingest that I've seen before include "Absorb, assimilate" , "Swallow -signet (anag)" , "Eat - gin set (anag)" , "Take in with tinges" , "Swallow, absorb" .)