Get by financially (4,4,4)
I believe the answer is:
make ends meet
'get by financially' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for make ends meet that I've seen before include "Just about manage" , "Just have enough income" , "unite extremists" , "Live within one's income" , "The Channel Tunnel consortium had to" .)