Being injured, a chap takes me in (5)

I believe the answer is:

lamed

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'being injured' is the definition.
(I've seen this in another clue)

'a chap takes me in' is the wordplay.
'a chap takes' becomes 'lad' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'lad' going around 'me' is 'LAMED'.

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(Other definitions for lamed that I've seen before include "With crippling injury" , "Medal (anag)" , "Crippled" .)

I've seen this clue in the Evening Standard.

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