Right at the back in small ferry (4)
I believe the answer is:
raft
'small ferry' is the definition.
'raft' can be an answer for 'ferry' (thesaurus). I'm unsure of the 'small' bit.
'right at the back' is the wordplay.
'right' becomes 'r' (abbreviation).
'at' means one lot of letters go next to another.
'the back' becomes 'aft' (at the back of a ship).
'r'+'aft'='RAFT'
'in' is the link.
Can you help me to learn more?
(Other definitions for raft that I've seen before include "Floating platform of logs, planks, etc" , "Simple craft" , "Travel on river, in a way" , "Floating framework" , "Simple boat" .)