Fit to serve up in Kashmir Tandoori (4)
I believe the answer is:
trim
'fit' is the definition.
('trim' can be a synonym of 'fit')
'serve up in kashmir tandoori' is the wordplay.
'serve up' shows that the letters should be reversed in order.
'in' indicates a hidden word.
'mirt' can be found hidden inside 'kashmir tandoori'.
'mirt' reversed gives 'TRIM'.
'to' is the link.
(Other definitions for trim that I've seen before include "Pare; in good order" , "Cut away protruding bits, say of hair" , "Neat and ticy in Meath" , "Reduce slightly" , "Cut off; in good order" .)