Part of our pinnace, initially (4)
I believe the answer is:
poop
'part of our pinnace initially' is the definition.
I can't judge whether this defines the answer.
'part of our pinnace initially' is the wordplay.
'initially' indicates taking the first letters.
The initial letters of 'part of our pinnace' is 'POOP'.
Can you help me to learn more?
(Other definitions for poop that I've seen before include "High deck at old sailing ship's stern" , "Deck at stern of ship" , "Highest aftmost deck" , "Exhaust" , "Highest deck of ship" .)