Barely manage, with "out" (3)
I believe the answer is:
eke
'barely manage with out' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eke that I've seen before include "Make last longer" , "Stretch (out); in addition (archaic)" , "Supplement" , "addition to Scots" , "Increase, lengthen" .)