Don't stand up to pressure, you grant (4)
I believe the answer is:
give
'grant' is the definition.
(synonyms)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for give that I've seen before include "Donate, grant" , "To yield; resilience" , "Yield to pressure" , "Offer, elasticity" , "Yield - supply" .)