Example of fellow in unusually nice surroundings (8)
I believe the answer is:
instance
'example' is the definition.
('instance' can be a synonym of 'example')
'fellow in unusually nice surroundings' is the wordplay.
'fellow in' becomes 'stan' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'unusually' indicates an anagram.
'surroundings' means one lot of letters goes inside another.
'nice' with letters rearranged gives 'ince'.
'stan' put within 'ince' is 'INSTANCE'.
'of' acts as a link.
(Other definitions for instance that I've seen before include "Occasion" , "Example or single occurrence of something" , "Exemplify" , "Cite as an example" , "'Example, illustration (8)'" .)