Spy almost fell from the sky, getting injured (8)
I believe the answer is:
sprained
'injured' is the definition.
(spraining is a kind of injuring)
'spy almost fell from the sky getting' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'fell from the sky' becomes 'rained' (I've seen this in another clue).
'getting' is a charade indicator (letters next to each other).
'spy' with its final letter taken off is 'sp'.
'sp'+'rained'='SPRAINED'
(Other definitions for sprained that I've seen before include "Wrenched a ligament, causing pain and swelling" , "Ricked" .)