Great sliced sandwiches at Henley meeting? (7)
I believe the answer is:
regatta
'henley meeting?' is the definition.
'regatta' can be an answer for 'meeting?' (I've seen this before). I am not certain of the 'henley' bit.
'great sliced sandwiches at' is the wordplay.
'sliced' is an anagram indicator.
'sandwiches' means one lot of letters goes inside another (goes on either side like a sandwich).
'great' anagrammed gives 'regta'.
'regta' placed around 'at' is 'REGATTA'.
Can you help me to learn more?
(Other definitions for regatta that I've seen before include "Boat-race meeting" , "Racing boats" , "Number of yachts in sporting event" , "Yacht-race event" , "Sporting event with boat or yacht races" .)