Did she come out in a rash? (5)

I believe the answer is:

sarah

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

'did she come out' is the definition.
I can't tell whether this definition defines the answer.

'a rash?' is the wordplay.
'a rash' anagrams to 'SARAH'.
Though, I am unsure how the anagram is indicated.

'in' is the link.

Can you help me to learn more?

(Other definitions for sarah that I've seen before include "Girl" , "Wife of Abraham" , "Lady" , "Abraham's wife (OT)" , "- Bernhardt, Fr. actress" .)

I've seen this clue in the Evening Standard.

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