Barely spot obvious signs of injury (5)
I believe the answer is:
limps
'obvious signs of injury' is the definition.
(a limp indicates a leg injury)
'barely spot' is the wordplay.
'barely' says to take the centre (the word is bare of its external letters).
'spot' becomes 'glimpse' (I've seen this before).
The middle of 'glimpse' is 'LIMPS'.
(Other definitions for limps that I've seen before include "Hobbles" , "Walks haltingly" .)