Holy man sat around at home (5)
I believe the answer is:
'holy man' is the definition.
(I know that holy man can be written as saint)
'sat around at home' is the wordplay.
'around' means one lot of letters goes inside another.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'sat' placed around 'in' is 'SAINT'.
(Other definitions for saint that I've seen before include "Canonised person" , "Good woman" , "eg Pancras" , "Beatified person" , "eg John, Paul or George" .)