Exercises, so ready for trip to Cuba? (4)

I believe the answer is:

peso

'ready for trip to cuba?' is the definition.
(peso is the currency of Cuba)

'exercises so' is the wordplay.
'exercises' becomes 'pe' (Physical Education class).
'pe'+'so'='PESO'

(Other definitions for peso that I've seen before include "ready for Mexican" , "Currency of Mexico" , "Chilean currency" , "Mexican monetary unit" , "Foreign currency" .)

I've seen this clue in The Times.

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.