Counter secure at opening of Indian restaurant (7)
I believe the answer is:
italian
'restaurant' is the definition.
(I know that Italian is a type of restaurant)
'counter secure at opening of indian' is the wordplay.
'counter' shows that the letters should be reversed in order (counter can mean in the opposite direction).
'secure' becomes 'nail' (both can mean to apprehend or capture).
'opening of' suggests taking the first letters.
The initial letter of 'indian' is 'i'.
'nail'+'at'+'i'='nailati'
'nailati' back-to-front is 'ITALIAN'.
(Other definitions for italian that I've seen before include "Mediterranean language" , "Native of Milan, say" , "being in Europe" , "A film was made about such a job" , "Native of, eg, Rome" .)