Adjustable part of a backpack (5)
I believe the answer is:
strap
(Other definitions for strap that I've seen before include "Leather thong" , "punishment in school" , "Secure" , "Narrow strip of leather" , "Elongated leather strip" .)
I believe the answer is:
strap
(Other definitions for strap that I've seen before include "Leather thong" , "punishment in school" , "Secure" , "Narrow strip of leather" , "Elongated leather strip" .)