When I call out erroneously, it's a bloomer (5)

I believe the answer is:

lilac

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'a bloomer' is the definition.
I can't tell whether this definition defines the answer.

'when i call out erroneously' is the wordplay.
'when i' becomes 'li' (I am not sure about this - if you are sure you should believe this answer much more).
'out' means to remove the last letter.
'erroneously' indicates an anagram.
'call' with its final letter removed is 'cal'.
'cal' is an anagram of 'lac'.
'li'+'lac'='LILAC'

'it's' acts as a link.

Can you help me to learn more?

(Other definitions for lilac that I've seen before include "Spiritual knowledge" , "Plant" , "garden ornamental" , "Tree with pink blossoms" , "Shrub with fragrant purplish or white flowers" .)

I've seen this clue in the Evening Standard.

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