Crossword Genius

Delhis defensive arrangement (6)

Ross

I believe the answer is:

shield

I'm a little stuck... Click here to teach me more about this clue!

'defensive arrangement' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'delhis' is the wordplay.
'delhis' can be anagrammed to 'SHIELD'.
Though, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for shield that I've seen before include "Protective structure or device" , "Protect, screen" , "Is held as protective device" , "Protect (from danger)" , "Sporting trophy; protect" .)

I've seen this clue in The Irish News.
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