Eat amount gobbled by solid figure (7)
I believe the answer is:
consume
'eat' is the definition.
(I know that eat can be written as consume)
'amount gobbled by solid figure' is the wordplay.
'amount' becomes 'sum' (synonyms).
'gobbled by' is an insertion indicator.
'solid figure' becomes 'cone' (I've seen this before).
'sum' going within 'cone' is 'CONSUME'.
(Other definitions for consume that I've seen before include "Eat, drink" , "Devour" , "Use up" , "Exhaust" .)