Mark Ruffalo's ultimately lacking in award he could win? (4)
I believe the answer is:
scar
'mark' is the definition.
(mark left by an injury)
'ruffalo's ultimately lacking in award he could win?' is the wordplay.
I cannot quite see how this works, but
'he' could be 'car' and 'car' is found in the answer.
A single letter 's' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for scar that I've seen before include "Craggy outcrop" , "Old-wound mark" , "Mark from a wound left on the skin" , "Mark left by the healing of injured tissue" , "Steep cliff; skin mark" .)