She prepares a saline solution (6)

I believe the answer is:

selina

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

'she' is the definition.

'prepares a saline solution' is the wordplay.
'saline' can be anagrammed to 'SELINA'.
However, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for selina that I've seen before include "Girl" , "A woman" .)

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