Prepare to pray (5)
I believe the answer is:
kneel
'prepare to pray' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kneel that I've seen before include "Bend one's knees" , "Prepare to be knighted" , "Get down to pray" , "Crouch down" , "Adopt position for prayer or submission" .)