Crossword Genius

A number possibly looking cross (3)


I believe the answer is:

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

'a number' is the definition.
(ten is a kind of number)

'looking cross' is the wordplay.
I cannot really see how this works, but
'cross' could be 't' (shape) and 't' is present in the answer.
The remaining letters 'en' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'possibly' is the link.

Can you help me to learn more?

(Other definitions for ten that I've seen before include "Half a score", "How many", "Very young", "time", "Figure".)

I've seen this clue in Evening Standard.