Different person subject to order, abandoned by British (5)
I believe the answer is:
other
'different' is the definition.
(similar in meaning)
'person subject to order abandoned by british' is the wordplay.
'person subject to order' becomes 'brother' (someone in a religious order).
'abandoned by' indicates named letters should be taken away.
'british' becomes 'br'.
'brother' with 'br' taken away is 'OTHER'.
(Other definitions for other that I've seen before include "not like you" , "Throe (anag)" , "Different; additional" , "Alternate; additional" , "Different (from those mentioned)" .)