Crossword Genius

A cast that's tree-like (4)

Ross

I believe the answer is:

ashy

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

'tree-like' is the definition.
I can't judge whether this definition defines the answer.

'a cast' is the wordplay.
'cast' becomes 'shy' (I've seen this before).
'a'+'shy'='ASHY'

'that's' is the link.

Can you help me to learn more?

(Other definitions for ashy that I've seen before include "Like, eg, volcanic dust" , "evidence of recent fire" , "resembling cinder track?" , "Like burnt remains" , "Like burnt residue" .)

I've seen this clue in The Guardian.
Want a hint initially instead of a full solution? Install my app