Under pressure, ready for a change, said Grace? (6)
I believe the answer is:
prayed
'said grace?' is the definition.
'under pressure ready for a change' is the wordplay.
'under' says to put letters next to each other.
'pressure' becomes 'p' (abbreviation).
'for a change' is an anagram indicator.
'ready' with letters rearranged gives 'rayed'.
'p' put next to 'rayed' is 'PRAYED'.
(Other definitions for prayed that I've seen before include "Worshipped" , "Addressed a deity" , "Implored" , "Begged" , "Addressed God" .)