Pray continue busy meeting, cutting in all over the place (2,2,5)
I believe the answer is:
be my guest
'pray continue' is the definition.
(both can be used to give someone permission)
'busy meeting cutting in all over the place' is the wordplay.
'cutting' indicates named letters should be taken away.
'all over the place' is an anagram indicator.
'busy'+'meeting'='busymeeting'
'busymeeting' with 'in' removed is 'busymeetg'.
'busymeetg' with letters rearranged gives 'BE MY GUEST'.
(Other definitions for be my guest that I've seen before include "Please do!" , "Go ahead" , "as 1 [HOTELIERS] might say" , "Do as you wish!" , "Help yourself!" .)