Down with a broken elbow? (5)
I believe the answer is:
below
'down' is the definition.
(I know that down can be written as below)
'a broken elbow?' is the wordplay.
'a broken' indicates anagramming the letters.
'elbow' with letters rearranged gives 'BELOW'.
'with' is the link.
(Other definitions for below that I've seen before include "Subordinate to" , "in one's cabin" , "as mentioned later" , "on earth" , "second-rate" .)