quietly commandeering, located centrally between two poles in a movable chair (5)
I believe the answer is:
sedan
'chair' is the definition.
(sedan chair is a type of chair)
'quietly commandeering located centrally' is the wordplay.
'quietly' becomes 'sean' (I can't explain this - if you can you should believe this answer much more).
'commandeering' indicates putting letters inside.
'located' becomes 'ddddd' (I've seen this in another clue).
'centrally' means to look at the middle letters.
The central letter of 'ddddd' is 'd'.
'sean' placed around 'd' is 'SEDAN'.
'between two poles in a movable' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for sedan that I've seen before include "Saloon-car" , "Covered seat carried by bearers" , "A closed litter for one passenger" , "Where Prussians defeated French" , "Palanquin; car" .)