She had taken in the feline that was injured (7)
I believe the answer is:
scathed
'was injured' is the definition.
I can't tell whether this definition defines the answer.
'she had taken in the feline' is the wordplay.
'she had' becomes 'she'd'.
'taken in' is an insertion indicator (some letters have taken in others).
'the feline' becomes 'cat' (cat is a kind of feline).
'shed' placed around 'cat' is 'SCATHED'.
'that' acts as a link.
Can you help me to learn more?
(Another definition for scathed that I've seen is " Poet's blasted".)