Poles wearing a wire - troublesome to install (5,2)
I believe the answer is:
swear in
'install' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.
'poles wearing a wire troublesome' is the wordplay.
'poles' becomes 'sn' (North and South poles).
'wearing' indicates putting letters inside.
'troublesome' is an anagram indicator.
'a'+'wire'='awire'
'awire' anagrammed gives 'weari'.
'sn' going around 'weari' is 'SWEAR IN'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for swear in that I've seen before include "Formally admit" , "Administer official oath" , "Induct into office" , "Administer oath to one taking up office" , "Inaugurate by oath" .)