To some extent (2,1,3)
(Other definitions for sort of that I've seen before include "Possibly, to an extent" , "To some (great or small) extent" , "Not quite, but almost" , "Somewhat" , "Not exactly" .)
'to some extent' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for in a way that I've seen before include "from one point of view" , "To some degree" , "Sort of, to a limited extent" , "In some respects, to a limited extent" , "Sort of, in some respects" .)
'to some extent' is the definition.
(adjectival suffix meaning to some extent)
This is the entire clue.
(Other definitions for ish that I've seen before include "Expiry (in Scots law)" , "loosely" , "Suffix meaning like or characteristic of" .)