Get down on this festival dance floor at last (5)
I believe the answer is:
eider
'get down on this' is the definition.
The definition suggests a singular noun which matches the answer.
'festival dance floor at last' is the wordplay.
'festival' becomes 'eid' (Muslim festival).
'at last' indicates one should take the final letters.
The last letters of 'dance floor' are 'er'.
'eid'+'er'='EIDER'
Can you help me to learn more?
(Other definitions for eider that I've seen before include "Duck from which down is obtained" , "Quilt- furnishing duck" , "Duck known for down" , "Down's source" , "I've noted down" .)