Ratchet engager
'ratchet engager' is the definition.
(I've seen this in another clue)
This is all the clue.
(Another definition for pawl that I've seen is " Ratcheting catch".)
(Other definitions for paul that I've seen before include "- Newman, US actor" , "One of the Beatles" , "Beatle - singer with Peter and Mary" , "Boy's name" , "Some rob Peter to pay .." .)