Frequent visitor sounds surprised at Institute and University in Belgium (7)
I believe the answer is:
habitue
'frequent visitor' is the definition.
(I've seen this before)
'sounds surprised at institute and university in belgium' is the wordplay.
I cannot quite understand how this works, but
'institute' could be 'i' (common abbreviation as in MIT) and 'i' is present in the answer.
'university' could be 'u' (abbreviation for university) and 'u' is located in the answer.
'belgium' could be 'b' (international vehicle registration code) and 'b' is found in the answer.
'at' is found in the answer.
The remaining letters 'he' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for habitue that I've seen before include "One of the regulars" , "Regular customer" , "Regular visitor (to place)" , "Constant visitor" , "One who visits a place frequently 97)" .)