Alternative given in physiotherapy (5)
I believe the answer is:
other
'alternative' is the definition.
(I've seen this before)
'in physiotherapy' is the wordplay.
'in' indicates the answer is hidden within the clue.
'OTHER' is hidden within 'physiotherapy'.
'given' acts as a link.
(Other definitions for other that I've seen before include "Different, disparate" , "not like you" , "Different (from those mentioned)" , "Distinct" , "Not the one mentioned" .)