Victor Meldrew finally put in the ground after heart transplant (6)
I believe the answer is:
winner
'victor' is the definition.
(I know that victor can be written as winner)
'meldrew finally put in the ground after heart transplant' is the wordplay.
'finally' indicates one should take the final letters.
'put in the ground after heart transplant' becomes 'inner' (I am not sure about this - if you are sure you should believe this answer much more).
The final letter of 'meldrew' is 'w'.
'w'+'inner'='WINNER'
Can you help me to learn more?
(Other definitions for winner that I've seen before include "The champ" , "Champion" , "One that came first" , "success" , "Top player" .)