Partially split height looks graceful, maybe (5)

I believe the answer is:

lithe

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

'graceful maybe' is the definition.
I can't tell whether this definition defines the answer.

'partially split height looks' is the wordplay.
'partially' indicates a hidden word.
'LITHE' is hidden in the letters of 'split height looks'.

Can you help me to learn more?

(Other definitions for lithe that I've seen before include "flex with no difficulty" , "Don -, opera by Verdi" , "Svelte" , "Elastic" , "Of body, flexible and supple" .)

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app