Point danger out and warn of attack (7)

I believe the answer is:

engarde

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'warn of attack' is the definition.
I can't tell whether this definition defines the answer.

'point danger out' is the wordplay.
'point' becomes 'e' (compass point).
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'danger' is an anagram of 'ngarde'.
'e'+'ngarde'='ENGARDE'

'and' acts as a link.

Can you help me to learn more?

(Another definition for engarde that I've seen is " Ready with foil".)

I've seen this clue in The Daily Express.

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