Good man in a new role looking after horses (6)
I believe the answer is:
ostler
'good man in a new role looking after horses' is the definition.
I can't tell whether this definition defines the answer.
'good man in a new role' is the wordplay.
'good man' becomes 'st' (abbreviation for saint).
'in' indicates putting letters inside.
'a new' indicates anagramming the letters.
'role' anagrammed gives 'oler'.
'st' inserted into 'oler' is 'OSTLER'.
Can you help me to learn more?
(Other definitions for ostler that I've seen before include "Inn attendant (hist.)" , "Groom at inn" , "Horseman at the inn of old" , "Old stableman at an inn -- sterol (anag)" , "Horse minder" .)