Support Poles organised around America (8)
I believe the answer is:
espousal
'support' is the definition.
(thesaurus)
'poles organised around america' is the wordplay.
'organised' indicates an anagram.
'around' indicates putting letters inside.
'america' becomes 'usa' ('U.S.A.' can be a synonym of 'america').
'poles' is an anagram of 'espol'.
'espol' going around 'usa' is 'ESPOUSAL'.
(Other definitions for espousal that I've seen before include "old-fashioned marriage" , "Favourable reception" , "championship" , "Backing, support" , "Adoption (of a cause) - USA's pole (anag)" .)