Crowd is idle, badly deployed (9)
I believe the answer is:
mobilised
'crowd is idle badly deployed' is the definition.
I can't judge whether this definition defines the answer.
'crowd is idle badly' is the wordplay.
'crowd' becomes 'mob' (mob can mean a crowd of people).
'badly' is an anagram indicator (letters in the wrong order).
'is'+'idle'='isidle'
'isidle' with letters rearranged gives 'ilised'.
'mob'+'ilised'='MOBILISED'
Can you help me to learn more?
(Other definitions for mobilised that I've seen before include "made ready for action" , "ready for campaign?" .)