Performer from Utah welcomed by one-time City worker (9)
I believe the answer is:
executant
'performer' is the definition.
(executant is a kind of performer)
'utah welcomed by one-time city worker' is the wordplay.
'utah' becomes 'ut' (I've seen this in other clues).
'welcomed by' is an insertion indicator (I've seen this in other clues).
'one-time' becomes 'ex'.
'city' becomes 'ec' (the City of London postcode).
'worker' becomes 'ant' (worker is a type of ant).
'ex'+'ec'+'ant'='execant'
'ut' placed within 'execant' is 'EXECUTANT'.
'from' is the link.
(Another definition for executant that I've seen is " Artist, performer".)