Wrong colour for Cilla? (5)

I believe the answer is:

lilac

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

'wrong colour' is the definition.
'lilac' can be an answer for 'colour' (I've seen this before). I am not certain of the 'wrong' bit.

'cilla?' is the wordplay.
'cilla' can be anagrammed to 'LILAC'.
Though, I am not clear how the anagram is indicated.

'for' is the link.

Can you help me to learn more?

(Other definitions for lilac that I've seen before include "Drop by about one, turning" , "I call (anag)" , "Light-purple" , "Lavender colour" , "Tree with pink blossoms" .)

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