She’ll come back when ready (5)

I believe the answer is:

tessa

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'she'll come' is the definition.
I can't tell whether this defines the answer.

'back when ready' is the wordplay.
'back' says the letters should be written backwards.
'when' becomes 'as'.
'ready' becomes 'set' (similar in meaning).
'as'+'set'='asset'
'asset' back-to-front is 'TESSA'.

Can you help me to learn more?

(Other definitions for tessa that I've seen before include "Girl" , "Tax-exempt special savings account" , "Girl's name, forerunner of ISA" , "Girl's name; former savings account" , "Woman" .)

I've seen this clue in the Evening Standard.

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