In two commercials private’s made fit (7)
I believe the answer is:
adapted
'made fit' is the definition.
('adapt' can be a synonym of 'make fit')
'in two commercials private's' is the wordplay.
'two commercials' means two substitutions for 'commercial'.
'in' indicates putting letters inside.
'commercial' becomes 'ad' (abbreviation for advertisement).
'commercial' becomes 'ad' (abbreviation for advertisement).
'private' becomes 'pte'.
'ad'+'ad'='adad'
'adad' enclosing 'pte' is 'ADAPTED'.
(Other definitions for adapted that I've seen before include "Altered" , "Modified to suit" , "Date-pad (anag.)" , "Adjusted to new conditions" , "Changed for a particular purpose" .)