Range covered by a minister (8)
I believe the answer is:
preacher
'minister' is the definition.
(someone who preaches)
'range covered by a' is the wordplay.
'range' becomes 'reach' (synonyms).
'covered by' indicates putting letters inside.
'a' becomes 'per' (eg 'one a day' means 'one per day').
'reach' put inside 'per' is 'PREACHER'.
(Other definitions for preacher that I've seen before include "Religious minister" , "cleric" , "Religious speaker" , "Minister, clergyman" , "evangelist found" .)