Sectarian leader struck worker (7)
I believe the answer is:
artisan
'worker' is the definition.
(someone skilled in a particular craft)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for artisan that I've seen before include "Handy worker" , "Skilled worker by hand" , "Egypt peninsula; holy Mount" , "Skilled craftsperson" , "Sinatra (anag) -- skilled manual worker" .)