Ray Brown has gym kit (7)
I believe the answer is:
sunbeam
'ray' is the definition.
(I know that sunbeam is a type of ray)
'brown has gym kit' is the wordplay.
'brown' becomes 'sun' (both can mean to get a tan).
'has' means one lot of letters go next to another.
'gym kit' becomes 'beam' (I can't justify this - if you can you should give a lot more credence to this answer).
'sun'+'beam'='SUNBEAM'
(Other definitions for sunbeam that I've seen before include "Ray of natural light" , "Bright ray -- bus name (anag)" , "sheds a bit of light" , "Ray of solar light" , "Bright shaft of daylight" .)