Organic gastropub starters for a trendy evening (6)
I believe the answer is:
innate
'organic' is the definition.
(thesaurus)
'gastropub starters for a trendy evening' is the wordplay.
'gastropub' becomes 'inna' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'starters for' indicates taking the first letters.
The first letters of 'trendy evening' is 'te'.
'inna'+'te'='INNATE'
Can you help me to learn more?
(Other definitions for innate that I've seen before include "native" , "Bred in the bone, one might say" , "'Inborn, not learned (6)'" , "Inborn, natural to (6)" , "Born" .)