Try something terribly easy around the leisure centre (5)
I believe the answer is:
essay
'try' is the definition.
(essay can mean to try or attempt something)
'terribly easy around the leisure centre' is the wordplay.
'terribly' indicates anagramming the letters.
'around' indicates putting letters inside.
'centre' indicates the central letters.
The centre of 'leisure' is 's'.
'easy' with letters rearranged gives 'esay'.
'esay' going around 's' is 'ESSAY'.
'something' is the link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for essay that I've seen before include "Short literary piece: attempt" , "Make an effort or attempt" , "example of Hazlitt's work" , "Short treatise" , "School compeosition" .)