It may be forced to obtain a decision (5)
I believe the answer is:
issue
This clue could be a double definition.
'it may be forced' is the first definition.
The definition suggests a singular noun which matches the answer.
'a decision' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'to obtain' acts as a link.
Can you help me to learn more?
(Other definitions for issue that I've seen before include "important point" , "Number (of periodical)" , "Result, outcome; topic" , "Supply" , "Children; important topic" .)