Pitch tent by US school region (6)
I believe the answer is:
campus
'school region' is the definition.
'campus' can be an answer for 'region' (campus is a kind of region). I am unsure of the 'school' bit.
'pitch tent by us' is the wordplay.
'pitch tent' becomes 'camp'.
'by' says to put letters next to each other.
'camp'+'us'='CAMPUS'
Can you help me to learn more?
(Other definitions for campus that I've seen before include "university position" , "university environment" , "University or college site" , "In study area" , "educational location" .)