“Dissolve rouble” (call of hard working labourers) (4-6)

I believe the answer is:

blue-collar

I'm a little stuck... Click here to teach me more about this clue!

'dissolve rouble call of hard working labourers' is the definition.
I can't judge whether this definition defines the answer.

'dissolve rouble call' is the wordplay.
'dissolve' indicates anagramming the letters.
'rouble'+'call'='roublecall'
'roublecall' is an anagram of 'BLUE-COLLAR'.

Can you help me to learn more?

(Other definitions for blue-collar that I've seen before include "Manual (work)" , "Relating to manual workers" .)

I've seen this clue in The Hindu.

Want a hint initially instead of a full solution? Install my app