It's subject to a high rate of inflation (3,3)

I believe the answer is:

air bag

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

'it's' is the definition.
I can't tell whether this defines the answer.

'subject to a high rate of inflation' is the wordplay.
'subject' becomes 'AI' (AI is an example).
'to a high' suggests taking the first letters (I've seen 'highest of' mean this (top letter - down clues only)).
'of inflation' becomes 'bag' (I can't justify this - if you can you should give a lot more credence to this answer).
The initial letter of 'rate' is 'r'.
'ai'+'r'+'bag'='AIR BAG'

Can you help me to learn more?

(Other definitions for air bag that I've seen before include "Rapidly-inflating car safety device" , "Inflatable safety device in car" , "A safety restraint in a car" , "Safety device in a motor car" , "Car safety cushion" .)

I've seen this clue in the Evening Standard.

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.