Unlikely double act formed when poodle dances with short duck (3,6)
I believe the answer is:
odd couple
'unlikely double act formed' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'poodle dances with short duck' is the wordplay.
'dances with' indicates an anagram.
'short' means to remove the last letter.
'duck' with its last letter taken off is 'duc'.
'poodle' mixed up with 'duc' can make 'ODD COUPLE'.
'when' acts as a link.
Can you help me to learn more?
(Other definitions for odd couple that I've seen before include "occasionally drunk" , "Peculiar duo (in play)" , "Unsuited partners" , "Ill-matched pair - Lemmon and Matthau" .)