Could he initially monitor disorder? (6)
I believe the answer is:
mayhem
'disorder?' is the definition.
(I've seen this in another clue)
'could he initially monitor' is the wordplay.
'could' becomes 'may' (I've seen this before).
'initially' suggests taking the first letters.
The initial letter of 'monitor' is 'm'.
'may'+'he'+'m'='MAYHEM'
(Other definitions for mayhem that I've seen before include "Havoc, violent disturbance" , "State of great confusion and disorder" , "Violent damage, chaos" , "Chaos, confusion, destruction" , "Big trouble!" .)