Organises men and tigers in a new way (9)
I believe the answer is:
regiments
'organises' is the definition.
(I know this)
'men and tigers in a new way' is the wordplay.
'and' is a charade indicator (letters next to each other).
'in a new way' indicates an anagram.
'men'+'tigers'='mentigers'
'mentigers' is an anagram of 'REGIMENTS'.
(Other definitions for regiments that I've seen before include "fighting units" , "Organises" , "groups of soldiers" .)