See Jane about one high stronghold? (5)
I believe the answer is:
eyrie
'high stronghold?' is the definition.
'eyrie' can be an answer for 'stronghold?' (I have seen 'elevated stronghold' mean 'eyrie' so perhaps 'stronghold' could also mean 'eyrie'). I am unsure of the 'high' bit.
'see jane about one' is the wordplay.
'see jane' becomes 'eyre' (I've seen this in other clues).
'about' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'eyre' enclosing 'i' is 'EYRIE'.
Can you help me to learn more?
(Other definitions for eyrie that I've seen before include "Lofty nest of a bird of prey" , "nest site" , "Bird's nest" , "point of observation" , "retreat for hunter" .)