Ministerial work includes nap around one (8)
I believe the answer is:
priestly
'ministerial' is the definition.
(thesaurus)
'work includes nap around one' is the wordplay.
'work' becomes 'ply' (I've seen this before**).
'includes' means one lot of letters goes inside another.
'nap' becomes 'rest'.
'around' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'ply' placed around 'rest' is 'prestly'.
'prestly' going around 'i' is 'PRIESTLY'.
(Other definitions for priestly that I've seen before include "Pious" , "just like a cleric" , "Like a minister" , "Hieratic" , "Ecclesiastical" .)