By touring with less luggage, see Britain informally (7)
I believe the answer is:
blighty
'britain informally' is the definition.
'by touring with less luggage' is the wordplay.
'touring' is an insertion indicator (touring can mean going round).
'with less luggage' becomes 'light' (travelling light).
'by' enclosing 'light' is 'BLIGHTY'.
'see' is the link.
(Other definitions for blighty that I've seen before include "home for soldiers" , "England (sl.)" , "Home Country"" , "Britain (slang)" , "British soldiers' homeland" .)