Group penning single's making progress (6)
I believe the answer is:
rising
'progress' is the definition.
(thesaurus)
'group penning single's' is the wordplay.
'group' becomes 'ring'.
'penning' means one lot of letters goes inside another.
'single's' becomes 'is' (one).
'ring' going around 'is' is 'RISING'.
'making' is the link.
(Other definitions for rising that I've seen before include "Armed revolt against authority" , "A revolt; getting up" , "Ascension" , "Hill" , "Ascending" .)