Stayed terribly dour, Jones (9)
I believe the answer is:
sojourned
'stayed' is the definition.
(I've seen this before)
'terribly dour jones' is the wordplay.
'terribly' is an anagram indicator.
'dour'+'jones'='dourjones'
'dourjones' is an anagram of 'SOJOURNED'.
(Other definitions for sojourned that I've seen before include "stayed" , "Onerous DJ (anag.)" , "remained a while" .)