Store in Bahamas shut (5)
I believe the answer is:
amass
'store' is the definition.
(amassing is a kind of storing)
'in bahamas shut' is the wordplay.
'in' indicates the answer is hidden within the clue.
'AMASS' is hidden in the letters of 'bahamas shut'.
(Other definitions for amass that I've seen before include "Accumulate, heap up" , "Be a compiler" , "Stock up on" , "Collect, hoard" , "Accumulate over time" .)