Measure out aid, perhaps, as a go-between? (7)
I believe the answer is:
mediate
'as a go-between?' is the definition.
I can't tell whether this definition defines the answer.
'measure out aid perhaps' is the wordplay.
'measure' becomes 'mete' (I've seen this before**).
'out' is an insertion indicator.
'perhaps' is an anagram indicator.
'aid' anagrammed gives 'dia'.
'mete' placed around 'dia' is 'MEDIATE'.
Can you help me to learn more?
(Other definitions for mediate that I've seen before include "moderate" , "Help resolve a dispute" , "Umpire has to" , "try to resolve dispute" , "Arbitrate between parties in dispute" .)