Cockney is nowhere to be seen in time of putsch (4)
I believe the answer is:
ides
I believe this clue is a double definition.
'cockney is nowhere to be seen' is the first definition.
('hides' said with a cockney accent, dropping the 'H')
'time of putsch' is the second definition.
(when Julius Caesar was assassinated)
'in' is the link.
(Other definitions for ides that I've seen before include "15 March, say -- key date for Caesar" , "Caesar's bad day in March" , "Julius Caesar was killed during the . . . . of March" , "(In March) Caesar's time to beware" , "Side of March when Caesar died" .)