Great fried sandwiches at meeting (7)
I believe the answer is:
regatta
'meeting' is the definition.
(I've seen this before)
'great fried sandwiches at' is the wordplay.
'fried' indicates an anagram.
'sandwiches' indicates putting letters inside (to sandwich is to block something in).
'great' anagrammed gives 'regta'.
'regta' enclosing 'at' is 'REGATTA'.
(Other definitions for regatta that I've seen before include "It could involve a lot of rowing" , "Aquatic activity" , "Meeting for boat races" , "Organised boat races" , "races at sea" .)