One issue or several (6)
I believe the answer is:
number
This clue is a triple definition!
'one' is the first definition.
(one is a number)
'issue' is the second definition.
(synonyms)
'or' acts as a link.
'several' is the third definition.
(thesaurus)
(Other definitions for number that I've seen before include "Dance" , "less sensitive" , "more insensitive" , "For example, one" , "No longer" .)