Officials at Lord’s super — I’m bowled over! (7)

I believe the answer is:

umpires

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'officials' is the definition.
(umpire is a kind of official)

'lord's super i'm bowled over' is the wordplay.
'super i'm' anagrams to 'UMPIRES'.
Though, I am not clear how the anagram is indicated.

'at' acts as a link.

Can you help me to learn more?

(Other definitions for umpires that I've seen before include "Officials at cricket matches" , "Officials at cricket match" , "Sports adjudicators" , "they want fair play" , "Referees for cricket marches" .)

I've seen this clue in The Times.

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