Incursion that upset Dorian (6)

I believe the answer is:

inroad

'incursion' is the definition.
(inroad is a kind of incursion)

'upset dorian' is the wordplay.
'upset' indicates anagramming the letters.
'dorian' with letters rearranged gives 'INROAD'.

'that' acts as a link.

(Other definitions for inroad that I've seen before include "Foray" , "Incursion, raid" , "Ordain (anag.)" , "Encroachment; hostile attack" , "Encroachment, intrusion" .)

I've seen this clue in the Evening Standard.

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