Open hosting North American team (7)
I believe the answer is:
unscrew
'open' is the definition.
(unscrew can mean to open a screw-top lid)
'hosting north american team' is the wordplay.
'hosting' indicates putting letters inside (inserted letters are welcomed in or hosted).
'north' becomes 'N' (abbreviation).
'american' becomes 'us' (abbreviation for United States).
'team' becomes 'crew' (crew is a kind of team).
'n' going within 'us' is 'uns'.
'uns'+'crew'='UNSCREW'
(Other definitions for unscrew that I've seen before include "Release" , "Twist and open" , "Remove top" , "Twist off (a lid or cap)" , "Take off (eg, a lid)" .)