Crowd terribly idle is about to be sent on march? (9)
I believe the answer is:
mobilised
'to be sent on march?' is the definition.
I can't tell whether this definition defines the answer.
'crowd terribly idle is' is the wordplay.
'crowd' becomes 'mob' (mob is a kind of crowd).
'terribly' is an anagram indicator.
'idle'+'is'='idleis'
'idleis' is an anagram of 'ilised'.
'mob'+'ilised'='MOBILISED'
'about' acts as a link.
Can you help me to learn more?
(Other definitions for mobilised that I've seen before include "made ready for action" , "ready for campaign?" .)