Midas’s girl (3)

I believe the answer is:

ida

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

'girl' is the definition.

'midas's' is the wordplay.
'IDA' is hidden in amongst the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for ida that I've seen before include "Woman" , "Industry development group" , "Classic mount" , "Princess __ (G&S comic opera)" , "noted princess" .)

I've seen this clue in The Mirror.

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