Rush, not at home to ruffian (8)
I believe the answer is:
tearaway
'ruffian' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'rush not at home' is the wordplay.
'rush' becomes 'tear' (tear is a kind of rush).
'not at home' becomes 'away' (I've seen this before).
'tear'+'away'='TEARAWAY'
'to' is the link.
Can you help me to learn more?
(Other definitions for tearaway that I've seen before include "rebel" , "Delinquent" , "Rough" , "unruly character" , "Hothead" .)