Emperor runs a hunting trip that saves time (3,6)
I believe the answer is:
ras tafari
'emperor' is the definition.
(I've seen this before)
'runs a hunting trip that saves time' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'hunting trip' becomes 'safari' (I've seen this before).
'that saves' means one lot of letters goes inside another.
'time' becomes 't' (abbreviation).
'safari' placed around 't' is 'stafari'.
'r'+'a'+'stafari'='RAS TAFARI'
(Other definitions for ras tafari that I've seen before include "Movement whose followers worship an Ethiopian emperor" , "Royal once" , "opposed to Babylon?" .)