Criminal, larcenous to an extent, or altogether (2,3)
I believe the answer is:
in all
'altogether' is the definition.
(I know that altogether can be written as in all)
'criminal larcenous to an extent' is the wordplay.
'to an extent' indicates the answer is hidden within the clue.
'IN ALL' is hidden within 'criminal larcenous'.
'or' is the link.
(Other definitions for in all that I've seen before include "Altogether" , "after considering everything" , "Completely" , "Taken as a whole" , "With everything counted" .)