Wagging tail, one soon being cut off (9)
I believe the answer is:
isolation
'cut off' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'wagging tail one soon' is the wordplay.
'wagging' indicates an anagram (letters swing or wag around).
'one' becomes 'i' (Roman numeral).
'tail'+'i'+'soon'='tailisoon'
'tailisoon' is an anagram of 'ISOLATION'.
'being' is the link.
Can you help me to learn more?
(Other definitions for isolation that I've seen before include "Man could display this" , "Cutting off" , "Remote and lonely state" , "State of being alone" , "Quarantine; solitude" .)