Match cut short, setter's injured (5)

'injured' is the definition.
Both the answer and definition are adjectives. Maybe you can see an association between them that I don't see?

'match cut short setter's' is the wordplay.
'match' becomes 'game' (I've seen this before).
'cut short' means to remove the last letter.
'setter's' becomes 'my' (belonging to the crossword setter).
'game' with its final letter removed is 'gam'.
'gam'+'my'='GAMMY'

Can you help me to learn more?