One of a pair, very noisy, in a little boat (5)
I believe the answer is:
skiff
'a little boat' is the definition.
'skiff' can be an answer for 'boat' (skiff is a kind of boat). I am unsure of the 'a little' bit.
'one of a pair very noisy' is the wordplay.
'one of a pair' becomes 'ski' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'very noisy' becomes 'ff'.
'ski'+'ff'='SKIFF'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for skiff that I've seen before include "Small light boat" , "Light rowing boat for one person" , "Small rowing boat" .)