Order for fries, perhaps - in place of regular, generally (5)
I believe the answer is:
large
'order for fries perhaps in' is the definition.
I can't judge whether this definition defines the answer.
'of regular generally' is the wordplay.
'of' indicates the answer is hidden within the clue.
'LARGE' can be found hidden inside 'regular generally'.
'place' is the link.
Can you help me to learn more?
(Other definitions for large that I've seen before include "Bumper" , "Regal (anag)" , "Strapping" , "Sizable" , "Bulky" .)