"twin propellers" (4)
(Other definitions for oars that I've seen before include "Sculls" , "Al --, US gangster" , "Boating implements" , "Busy bodies usually stick them in, also used in rowing" , "Paddles" .)
'twin propellers' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'twin propellers' is the wordplay.
I cannot really see how this works, but
'twin' could be 'pair' (synonyms) and 'pair' is present in the answer.
'propellers' could be 'oars' (I've seen this in another clue) and 'oars' is present in the answer.
The remaining letters 'of' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?