Shrub beginning to languish unfortunately when growing up (5)

I believe the answer is:

salal

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

'shrub' is the definition.
(salal is a kind of shrub)

I can't explain the rest of the clue.

(Another definition for salal that I've seen is " evergreen shrub".)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.