Vision, for example, included poles in bishop’s seat (5)
I believe the answer is:
sense
'vision for example' is the definition.
(vision is a kind of sense)
'poles in bishop's seat' is the wordplay.
'poles' becomes 'ns' (North and South poles).
'in' means one lot of letters goes inside another.
'bishop's seat' becomes 'see' (I've seen this before).
'ns' put within 'see' is 'SENSE'.
'included' is the link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for sense that I've seen before include "Become aware of" , "Purport" , "Meaning; perception" , "Could be hearing" , "Detect, be aware of" .)