Where needles are kept just in case (4)
I believe the answer is:
etui
'in case' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for etui that I've seen before include "Small ornamental case" , "Small case for sewing accessories" , "Case for holding sewing articles" , "Small case for small articles" , "Needlework case" .)