Put them into the office on about one in choice by vote (8)
I believe the answer is:
election
'choice by vote' is the definition.
(I've seen this before)
'put them into the office on about one' is the wordplay.
I cannot really understand how this works, but
an anagram of 'into' is 'tion' which is within the answer.
'about' could be 'c' (abbreviation for circa) and 'c' is located in the answer.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for election that I've seen before include "Public vote" , "A vote to select the winner" , "Selection by ballot" , "Formal vote" , "Poll" .)