Paddle in middle of boat, right? (3)
I believe the answer is:
oar
'paddle' is the definition.
(I've seen this in another clue)
'middle of boat right?' is the wordplay.
'middle of' says to take the centre.
'boat' becomes 'row' (rowing is a kind of boating).
'right?' becomes 'ar' (I've seen this in other clues).
The middle letter of 'row' is 'o'.
'o'+'ar'='OAR'
'in' acts as a link.
(Other definitions for oar that I've seen before include "that may be feathered?" , "Rower's paddle" , "Manual boat propeller" , "Sweep" , "Use it to move a boat" .)