Resort seeing case of reasonable progress (8)
I believe the answer is:
recourse
'resort' is the definition.
('recourse' can be a synonym of 'resort')
'case of reasonable progress' is the wordplay.
'case of' means to remove the middle letters (outsides of).
'progress' becomes 'course' (I have seen 'Routine progress' mean 'course' so perhaps 'progress' could also mean 'course'**).
'reasonable' with its centre removed is 're'.
're'+'course'='RECOURSE'
'seeing' acts as a link.
(Other definitions for recourse that I've seen before include "Legal right to demand payment" , "one looked to for help?" , "Help; option" , "Expedient" , "A source of help, like resource" .)