Somehow, anywhere or on to a roundabout (3,3,2,7)
I believe the answer is:
one way or another
'somehow' is the definition.
(I've seen this in another clue)
'anywhere or on to a roundabout' is the wordplay.
'roundabout' is an anagram indicator.
'anywhere'+'or'+'on'+'to'+'a'='anywhereorontoa'
'anywhereorontoa' anagrammed gives 'ONE WAY OR ANOTHER'.
(Other definitions for one way or another that I've seen before include "Decision to be taken at a crossroads" , "somehow?" .)