Leave behind with charge and heat (7)
I believe the answer is:
passion
'heat' is the definition.
(synonyms)
'leave behind with charge' is the wordplay.
'leave behind' becomes 'pass' (pass is a kind of leave. I am not sure about the 'behind' bit.).
'with' means one lot of letters go next to another.
'charge' becomes 'ion' (an ion is a charged particle).
'pass'+'ion'='PASSION'
'and' is the link.
Can you help me to learn more?
(Other definitions for passion that I've seen before include "Strong emotion, anger or love" , "Strong feeling, or anger or desire possibly" , "thing one really cares about" , "Rage" , "Fervent love" .)