One providing education in workers’ organisation to prosper finally (5)
I believe the answer is:
tutor
'one providing education' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'workers' organisation to prosper finally' is the wordplay.
'workers' organisation' becomes 'tu' (abbreviation for trade union).
'finally' suggests the final letters.
The last letter of 'prosper' is 'r'.
'tu'+'to'+'r'='TUTOR'
'in' is the link.
Can you help me to learn more?
(Other definitions for tutor that I've seen before include "class leader" , "Guardian" , "Edify" , "Teacher (often private)" , "School" .)