Young bird going round central isle (7)
I believe the answer is:
gosling
'young bird' is the definition.
(I've seen this before)
'going round central isle' is the wordplay.
'round' indicates putting letters inside.
'central' means to look at the middle letters.
The middle of 'isle' is 'sl'.
'going' placed around 'sl' is 'GOSLING'.
(Other definitions for gosling that I've seen before include "Young goose" , "Little bird" , "Young bird" , "Young waterbird" .)