Special athletes who possibly get most attention (5,3,4)
I believe the answer is:
steal the show
'get most attention' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'special athletes who' is the wordplay.
I cannot really understand how this works, but
'special' could be 's' (common abbreviation as in Special Air Service) and 's' is located in the answer.
an anagram of 'athletes' is 'tealthes' which is present in the answer.
an anagram of 'who' is 'how' which is within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'possibly' is the link.
Can you help me to learn more?
(Other definitions for steal the show that I've seen before include "capture everyone's attention" , "Unexpectedly attract the most applause" , "Attract the most attention and praise" , "Unexpectedly emerge as the outstanding performer" , "Draw most attention and praise" .)