Surround (a town) with forces (7)

I believe the answer is:

besiege

(Other definitions for besiege that I've seen before include "Enclose, preventing ingress or egress" , "Surround (a place) with hostile intent" , "Pester" , "Surround (town etc) with armed forces" , "Invest" .)

I've seen this clue in The Times.

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