Religious brother (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
friar
'religious brother' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for friar that I've seen before include "Mendicant preacher" , "Member of one of the four mendicant orders" , "Monk perhaps" , "Mendicant priest" , "Father" .)