Nothing seen in rising star shows common sense (4)
I believe the answer is:
nous
'common sense' is the definition.
(nous is a kind of common sense)
'nothing seen in rising star' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'seen in' means one lot of letters goes inside another.
'rising' shows that the letters should be reversed in order (going up in a down clue).
'star' becomes 'sun' (Sun is an example).
'sun' reversed gives 'nus'.
'o' inserted within 'nus' is 'NOUS'.
'shows' is the link.
(Other definitions for nous that I've seen before include "we found in Sorbonne, for example" , "Common-sense" , "FT in Paris, say" , "Common sense, rhymes with house" , "Informal common sense" .)