Kill time and give orders heartlessly (9)
I believe the answer is:
eradicate
'kill' is the definition.
(eradicating is a kind of killing)
'time and give orders heartlessly' is the wordplay.
'time' becomes 'era' (era is a kind of time).
'and' is a charade indicator (letters next to each other).
'give orders' becomes 'dictate' (I've seen this before).
'heartlessly' means to remove the middle letters.
'dictate' with its middle taken out is 'dicate'.
'era'+'dicate'='ERADICATE'
(Other definitions for eradicate that I've seen before include "Excise" , "Kill" , "Expunge" , "Scotch" , "scratch" .)