Workers' organisation with means of raising flag (5,4)
I believe the answer is:
union jack
'flag' is the definition.
(Union Jack is an example)
'workers' organisation with means of raising' is the wordplay.
'workers' organisation' becomes 'union' (I've seen this before).
'with' says to put letters next to each other.
'means of raising' becomes 'jack' (I can't justify this - if you can you should believe this answer much more).
'union'+'jack'='UNION JACK'
Can you help me to learn more?
(Other definitions for union jack that I've seen before include "Colours" , "standard for us" , "National flag of United Kingdom" , "appears up the pole" , "UK's standard" .)