Do eat mushroom, take it (6)
I believe the answer is:
accept
'take it' is the definition.
(thesaurus)
'do eat mushroom' is the wordplay.
'do' becomes 'act' (I've seen this in another clue).
'eat' is an insertion indicator.
'mushroom' becomes 'cep' (name for Boletus edulis - an edible mushroom).
'act' placed around 'cep' is 'ACCEPT'.
(Other definitions for accept that I've seen before include "Consent to receive" , "Receive voluntarily" , "Say yes > to trust" , "Swallow" , "one wouldn't say no to this" .)