Dish very dry steeped in port? (7)
I believe the answer is:
risotto
'dish' is the definition.
(risotto is a kind of dish)
'very dry steeped in port?' is the wordplay.
'very' becomes 'so' (both can mean 'extremely').
'dry' becomes 'tt' (abbreviation for teetotal).
'steeped in' indicates putting letters inside (I've seen this in other clues).
'port?' becomes 'rio' (Rio de Janeiro is a port).
'so'+'tt'='sott'
'sott' put within 'rio' is 'RISOTTO'.
(Other definitions for risotto that I've seen before include "Italian dish cooked with broth" , "Italian dish of rice, meat and vegetables" , "Main course" , "F" , "It has roots in Italian rice-based dish" .)