Dull husband stuck inside boat (6)
I believe the answer is:
dinghy
'boat' is the definition.
(type of boat)
'dull husband stuck inside' is the wordplay.
I cannot quite understand how this works, but
'husband' could be 'h' (abbreviation) and 'h' is present in the answer.
'inside' could be 'in' and 'in' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for dinghy that I've seen before include "Light rowing boat" , "Small open boat, maybe a rubber inflatable" , "Small rowing or sailing boat" , "Small boat propelled with oars" , "Small boat, may be a rubber inflatable" .)