Runs in frightened, marked by wound (7)
I believe the answer is:
scarred
'marked by wound' is the definition.
(I've seen this before)
'runs in frightened' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'in' indicates putting letters inside.
'frightened' becomes 'scared' (scared means frightened or fearful).
'r' going within 'scared' is 'SCARRED'.
(Other definitions for scarred that I've seen before include "Blemished" , "bearing evidence of injury" , "Marked (by wound)" , "Flawed" , "Bearing the marks of wounds" .)