The phrase "council colleagues" refers to the people who work together in a group or team within a council. They are the colleagues, or coworkers, who are part of the same council. Full definition
Without a single council colleague to share it out with, the volume of paperwork I face can be somewhat daunting. (politics.co.uk)
Vallone also hailed his former City Council colleague, current Comptroller John Liu, who was viewed as a strong mayoral candidate until a recent fundraising scandal sent him tumbling in the polls. (dnainfo.com)
But your own former council colleagues in the Labour Party won't work with you, will they? (newstatesman.com)