Priest sent on mission with article about dancing (13)
I believe the answer is:
terpsichorean
'about dancing' is the definition.
'priest sent on mission with article' is the wordplay.
'sent' indicates an anagram (send can mean to excite or stimulate).
'on mission' becomes 'chore' (I can't justify this - if you can you should believe this answer much more).
'with' means one lot of letters go next to another.
'article' becomes 'an' (English indefinite article).
'priest' is an anagram of 'terpsi'.
'terpsi'+'chore'+'an'='TERPSICHOREAN'
Can you help me to learn more?
(Other definitions for terpsichorean that I've seen before include "become a dancer" , "Relating to dancing" , "Related to dancing - chain store rep (anag)" , "of dance numbers" .)