Possessing hearts, card laid on top (4)
I believe the answer is:
with
'possessing' is the definition.
(I've seen this before)
'hearts card laid on top' is the wordplay.
I cannot really understand how this works, but
'hearts' could be 'h' (abbreviation used in card games e.g. bridge) and 'h' is located in the answer.
'card' could be 'wit' (synonyms) and 'wit' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for with that I've seen before include "Alongside" , "In the company of" , "Among" , "Accompanied by" , "Characterised by" .)