ˈside ˌissue BrE AmE noun [countable]
a subject or problem that is not as important as the main one, and may take people’s attention away from the main subject:
The tax proposal is really a side issue with us.
ˈside ˌissue BrE AmE noun [countable]
a subject or problem that is not as important as the main one, and may take people’s attention away from the main subject:
The tax proposal is really a side issue with us.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012