Blog sent a student around the world (6)
I believe the answer is:
global
'the world' is the definition.
(I've seen this before)
'blog sent a student' is the wordplay.
'sent' indicates an anagram (send can mean to excite or stimulate).
'student' becomes 'l' (as in L-plates for learner drivers).
'blog' is an anagram of 'glob'.
'glob'+'a'+'l'='GLOBAL'
'around' acts as a link.
(Other definitions for global that I've seen before include "Universal" , "Going round the world" , "Sphere-shaped" , "Of the whole world, worldwide" , "Like big village" .)