It's in difficult roles that one maybe makes little progress (7)
I believe the answer is:
loiters
'one maybe makes little progress' is the definition.
I can't tell whether this defines the answer.
'it's in difficult roles' is the wordplay.
'in' is an insertion indicator.
'difficult' indicates an anagram.
'roles' is an anagram of 'loers'.
'it' placed inside 'loers' is 'LOITERS'.
'that' is the link.
Can you help me to learn more?
(Other definitions for loiters that I've seen before include "Waits idly" , "Hangs around" , "dawdles" , "Hangs about idly" , "Hangs about with toilers" .)