Fit to serve up in Kashmir Tandoori (4)
I believe the answer is:
Here is my best explanation:
'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.