Villain caught breaking into safe on fifth of April (9)
I believe the answer is:
scoundrel
'villain' is the definition.
(I know that villain can be written as scoundrel)
'caught breaking into safe on fifth of april' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'breaking into' indicates putting letters inside.
'safe' becomes 'sound' (similar in meaning).
'on' becomes 're' ('on' can be mean 'with reference to').
'fifth of april' becomes 'l' (5th letter of 'april').
'c' going into 'sound' is 'scound'.
'scound'+'re'+'l'='SCOUNDREL'
(Other definitions for scoundrel that I've seen before include "A rogue or dishonest person" , "Rascal" , "Person that's low" , "Red consul may be a rogue" , "Cad" .)