Disciple to pursue queen (8)
I believe the answer is:
follower
'disciple' is the definition.
(I've seen this before)
'pursue queen' is the wordplay.
'pursue' becomes 'follow' (I've seen this before).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'follow'+'er'='FOLLOWER'
'to' is the link.
(Other definitions for follower that I've seen before include "A loyal adherent - or a pursuer" , "fan" , "Supporter" , "Disciple" , "Person who succeeds" .)