Rat seen travelling from China, say (7)
I believe the answer is:
eastern
'from china say' is the definition.
(China is in the east)
'rat seen travelling' is the wordplay.
'travelling' is an anagram indicator.
'rat'+'seen'='ratseen'
'ratseen' with letters rearranged gives 'EASTERN'.
(Other definitions for eastern that I've seen before include "See 11" , "Indian perhaps" , "in Beijing, possibly" , "Could be Chinese" , "Possibly Japanese" .)