There's a sign woven into her mat (3,3)

'mat' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'there's a sign woven into her' is the wordplay.
I cannot really see how this works, but
'a' is present in the answer.
'sign' could be 'he' (he is a kind of sign) and 'he' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?