Equally filling tripe to cook (5)
I believe the answer is:
roast
'cook' is the definition.
(roasting is a kind of cooking)
'equally filling tripe' is the wordplay.
'equally' becomes 'as' (synonyms).
'filling' is an insertion indicator.
'tripe' becomes 'rot' (I've seen this in another clue).
'as' going within 'rot' is 'ROAST'.
'to' acts as a link.
(Other definitions for roast that I've seen before include "Tear to pieces" , "Trash" , "Slate" , "Be uncomfortably hot" , "cooked a certain way" .)