One way or another (7)
I believe the answer is:
somehow
'one way or another' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for somehow that I've seen before include "For an unknown reason; so who, me? (anag.)" , "By hook or by crook" , "By one means or another" , "For some unspecified reason" , "One way or another" .)