Crossword Genius

She's spotted following a band (4)

Ross

I believe the answer is:

anna

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

'she's' is the definition.
(I've seen this before)

'spotted following a band' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is located in the answer.
The remaining letters 'na' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for anna that I've seen before include "and eleven, twenty four across heroine" , "Unit of length" , "Book by Tolstoy" , "Miss Karenina" , "worth very little in India" .)

I've seen this clue in The Globe and Mail.
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