Crossword Genius

Invade once arch rebuilt (8)

Ross

I believe the answer is:

encroach

'invade' is the definition.
(to encroach upon is to invade)

'once arch rebuilt' is the wordplay.
'rebuilt' indicates an anagram.
'once'+'arch'='oncearch'
'oncearch' with letters rearranged gives 'ENCROACH'.

(Other definitions for encroach that I've seen before include "Intrude on somebody's territory or time" , "Advance beyond proper limit" , "Make inroads" , "Intrude on another's property or rights" , "'Trespass, infringe (8)'" .)

I've seen this clue in The Telegraph.
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