Star in danger after moving east (8)
I believe the answer is:
asterisk
'star' is the definition.
(synonyms)
'danger after moving east' is the wordplay.
'danger' becomes 'risk' (risk is a kind of danger).
'after' means one lot of letters go next to another.
'moving' is an anagram indicator (letters are moved around).
'east' is an anagram of 'aste'.
'risk' put after 'aste' is 'ASTERISK'.
'in' acts as a link.
(Other definitions for asterisk that I've seen before include "Star of typography" , "Star-shaped mark in printing" , "Star for the printer" , "Sign" , "Text-marking symbol" .)