Inn or brae running? That's a very simple decision! (2-7)
I believe the answer is:
no-brainer
'a very simple decision' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'inn or brae running?' is the wordplay.
'running?' is an anagram indicator.
'inn'+'or'+'brae'='innorbrae'
'innorbrae' is an anagram of 'NO-BRAINER'.
'that's' is the link.
Can you help me to learn more?
(Other definitions for no-brainer that I've seen before include "Something involving little or no mental effort" , "It's totally clear" , "Obvious choice" , "That which must be done, obviously" , "Something requiring little or no mental effort" .)