I'll leave things behind with malevolence (3,4)
I believe the answer is:
'malevolence' is the definition.
(I've seen this before)
'i'll leave things behind' is the wordplay.
I cannot quite see how this works, but
'i'll' could be 'ill' and 'ill' is located in the answer.
'leave' could be 'will' (synonyms) and 'will' is found in the answer.
No letters remain.
This explanation may well be incorrect...
'with' acts as a link.
Can you help me to learn more?
(Other definitions for ill will that I've seen before include "Rancour" , "Hostility, unkind feeling" , "Hostility, malevolence" , "causing resentment" , "Bad feeling towards, hostility" .)