Help last Icelandic region to be flexible (7)

I believe the answer is:

plastic

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

'flexible' is the definition.
(I've seen this in another clue)

'help last icelandic region to' is the wordplay.
'PLASTIC' is hidden within the letters.
But, I'm uncertain how this is indicated.

'be' acts as a link.

Can you help me to learn more?

(Other definitions for plastic that I've seen before include "Artificial; easily moulded" , "Credit cards are known as ....... money" , "means of deferring payment" , "Scalp it badly to make a synthetic material" , "Easily shaped/moulded" .)

I've seen this clue in the Sydney Morning Herald.

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.