Performing bears about to leave coastal state (6)
I believe the answer is:
oregon
'coastal state' is the definition.
'performing bears about to' is the wordplay.
'performing' becomes 'on' (I've seen this in other clues).
'bears' indicates putting letters inside.
'about to' becomes 'rego' (I am not sure about this - if you are sure you should believe this answer much more).
'on' enclosing 'rego' is 'OREGON'.
'leave' is the link.
Can you help me to learn more?
(Other definitions for oregon that I've seen before include "American Pacific state" , "No gore seen in this American state" , "US north-western coastal state" , "US region" , "Gooner (anag) - US state" .)