Put differently, traveller has English about right (8)
I believe the answer is:
rephrase
'put differently' is the definition.
(I've seen this before)
'traveller has english about right' is the wordplay.
'traveller' becomes 'rep' (travel company worker).
'english' becomes 'E' (abbreviation as in OED).
'about' means one lot of letters goes inside another.
'right' becomes 'r' (common abbreviation).
'has'+'e'='hase'
'hase' enclosing 'r' is 'hrase'.
'rep'+'hrase'='REPHRASE'
(Other definitions for rephrase that I've seen before include "Express differently" , "put differently" , "Say again in different words" , "express in another way" , "Write in a different way" .)