Nominal asset, possibly (5)

I believe the answer is:

tessa

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

'nominal asset possibly' is the definition.
I can't tell whether this definition defines the answer.

'asset possibly' is the wordplay.
'possibly' indicates an anagram.
'asset' anagrammed gives 'TESSA'.

Can you help me to learn more?

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

I've seen this clue in the Evening Standard.

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