Crossword Genius

Thin membranes leading to anemia without drug administration (5)

Ross

I believe the answer is:

amnia

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

'thin membranes' is the definition.
'amnia' can be an answer for 'membranes'. I'm unsure of the 'thin' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for amnia that I've seen is " First bodyguards".)

I've seen this clue in The Hindu.
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