See eastern star rising — or planet (5)
I believe the answer is:
venus
'planet' is the definition.
(Venus is an example)
'see eastern star rising' is the wordplay.
'see' becomes 'v' (Latin 'vide', used to direct a reader to a source).
'eastern' becomes 'e'.
'star' becomes 'sun' (Sun is an example).
'rising' is a reversal indicator (going up in a down clue).
'sun' reversed gives 'nus'.
'v'+'e'+'nus'='VENUS'
'or' acts as a link.
(Other definitions for venus that I've seen before include "Brightest planet" , "Roman goddess of love" , "Roman counterpart of Aphrodite" , "Aggrieved, peeved" , "not really a star" .)