A second photograph shows jelly (5)
I believe the answer is:
aspic
'jelly' is the definition.
(aspic is a kind of jelly)
'a second photograph' is the wordplay.
'a second' becomes 'as' (I've seen this in other clues).
'photograph' becomes 'pic' (I've seen this in other clues).
'as'+'pic'='ASPIC'
'shows' is the link.
(Other definitions for aspic that I've seen before include "Savoury meat or fish jelly" , "Clear meat or fish jelly" , "Savoury relish" , "Preservative jelly" , "Setter" .)