Bidding hard to relieve pressure in shipping abroad (9)

I believe the answer is:

exhorting

'bidding' is the definition.
(to exhort is to bid or beg)

'hard to relieve pressure in shipping abroad' is the wordplay.
I cannot quite see how this works, but
'hard' could be 'h' (abbreviation used in pencil classifications) and 'h' is found within the answer.
'in' is found in the answer.
This may be the basis of clue (or it may be nonsense).

I've seen this clue in The Guardian.

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.