Try something terribly easy around the leisure centre (5)
I believe the answer is:
essay
'try' is the definition.
('essay' can be a synonym of 'try')
'terribly easy around the leisure centre' is the wordplay.
'terribly' indicates anagramming the letters.
'around' indicates putting letters inside.
'centre' says to take the centre.
The centre of 'leisure' is 's'.
'easy' is an anagram of 'esay'.
'esay' going around 's' is 'ESSAY'.
'something' is the link.
I am not very happy about this link. It may be part of 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" .)