Guitarist ____ Clapton (4)
I believe the answer is:
eric
'guitarist clapton' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for eric that I've seen before include "Mr Clapton" , "- Morecambe, comic" , ".... the Red, Norwegian explorer who discovered Greenland in 10th century" , "Ernie's comic partner" , "- the Red, discoverer of Greenland" .)