On go? Get take away (6)
I believe the answer is:
remove
'take away' is the definition.
(I know that take away can be written as remove)
'on go?' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'go?' becomes 'move' ('move' can be a synonym of 'go').
're'+'move'='REMOVE'
'get' acts as a link.
(Other definitions for remove that I've seen before include "Abolish" , "class in school" , "Take away; form in some schools" , "Takeaway" , "Take away, dispose of" .)