Spend heaps left in plant (7)
I believe the answer is:
splurge
'spend' is the definition.
(I know that consume is a is a more specific form of the action of splurge)
'heaps left in plant' is the wordplay.
'heaps left' becomes 'l' (common abbreviation. I am not sure about the 'heaps' bit.).
'in' indicates putting letters inside.
'plant' becomes 'spurge' (spurge is a shrub).
'l' put inside 'spurge' is 'SPLURGE'.
Can you help me to learn more?
(Other definitions for splurge that I've seen before include "Bout of extravagant spending" , "Binge, fling" , "excessive amount" , "Orgy" , "Not very well" .)