Targeted by marketing strategy, left shambolic extremists initially in command (9)
I believe the answer is:
leafleted
'targeted by marketing strategy' is the definition.
(targeted with leaflets)
'left shambolic extremists initially in command' is the wordplay.
'shambolic' is an anagram indicator.
'initially' suggests taking the first letters.
'in' indicates putting letters inside.
'command' becomes 'lead' (I've seen this in another clue).
The initial letter of 'extremists' is 'e'.
'left' is an anagram of 'flet'.
'flet'+'e'='flete'
'flete' placed into 'lead' is 'LEAFLETED'.
(Another definition for leafleted that I've seen is " dropped fliers".)