Offal and joint put together in one vessel (9)
I believe the answer is:
lightship
'together in one vessel' is the definition.
'lightship' can be an answer for 'vessel' (lightship is a kind of vessel). I am not sure about the 'together in one' bit.
'offal and joint' is the wordplay.
'offal' becomes 'lights' (I've seen this before).
'and' means one lot of letters go next to another.
'joint' becomes 'hip' (part of body).
'lights'+'hip'='LIGHTSHIP'
'put' is the link.
Can you help me to learn more?
(Other definitions for lightship that I've seen before include "Guiding vessel sounds as if it has no cargo" , "vessel anchored near rocks?" , "The guiding vessel appears not to have much weight" , "which attracts the attention of sailors" , "Navigational aid" .)