Build, as a nest egg (5)
I believe the answer is:
amass
(Other definitions for amass that I've seen before include "Collect or gather" , "run up?" , "Gather together, pile up" , "Accumulate, heap up" , "Assemble" .)
I believe the answer is:
amass
(Other definitions for amass that I've seen before include "Collect or gather" , "run up?" , "Gather together, pile up" , "Accumulate, heap up" , "Assemble" .)