Summon don, serf out of order (4,3)

I believe the answer is:

send for

'summon' is the definition.
(thesaurus)

'don serf out of order' is the wordplay.
'out of order' is an anagram indicator.
'don'+'serf'='donserf'
'donserf' with letters rearranged gives 'SEND FOR'.

(Another definition for send for that I've seen is " Order to come or be brought".)

I've seen this clue in The Times.

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