Snake one caught with jelly (5)
I believe the answer is:
aspic
'jelly' is the definition.
(I know that aspic is a type of jelly)
'snake one caught' is the wordplay.
'snake' becomes 'asp' (asp is a kind of snake).
'one' becomes 'i' (Roman numeral).
'caught' becomes 'c' (cricket abbreviation).
'asp'+'i'+'c'='ASPIC'
'with' acts as a link.
(Other definitions for aspic that I've seen before include "Ending of Marlowe's thriller" , "Savoury meat or fish jelly" , "Clear savoury jelly" , "Savoury jelly for coating meat, eggs etc" , "garnish" .)