Name Welsh artist and English pop star (4)
I believe the answer is:
john
This clue is a triple definition!
'name' is the first definition.
(man's name)
'welsh artist' is the second definition.
(painter Augustus John)
'and' acts as a link.
'english pop star' is the third definition.
(musician Elton John)
(Other definitions for john that I've seen before include "Old King" , "Trick" , "man" , "office" , "Head" .)