Fastener husband used to secure a pipe (6)
I believe the answer is:
hookah
'pipe' is the definition.
(I know that hookah is a type of pipe)
'fastener husband used to secure a' is the wordplay.
'fastener' becomes 'hook' (hook is a kind of fastener).
'husband' becomes 'h' (abbreviation).
'used to secure' means one lot of letters goes inside another.
'hook'+'h'='hookh'
'hookh' going around 'a' is 'HOOKAH'.
(Other definitions for hookah that I've seen before include "Water-pipe" , "Oriental tobacco pipe that cools the smoke" , "Sort of pipe" , "What's smoked" , "Turkish pipe" .)