Husband boarding dirty-looking boat (6)
I believe the answer is:
dinghy
'boat' is the definition.
(type of boat)
'husband boarding dirty-looking' is the wordplay.
'husband' becomes 'h' (abbreviation).
'boarding' means one lot of letters goes inside another.
'dirty-looking' becomes 'dingy' (I've seen this in another clue).
'h' inserted into 'dingy' is 'DINGHY'.
(Other definitions for dinghy that I've seen before include "Small boat propelled with oars" , "Light rowing boat" , "craft" , "Small open boat, maybe a rubber inflatable" , "Small open boat, may be inflatable" .)