Did egg on uniform ultimately trigger meeting with my boss? (5)
I believe the answer is:
urged
'did egg on' is the definition.
(to egg someone on is to urge them to do something)
'uniform ultimately trigger meeting with my boss?' is the wordplay.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'ultimately' suggests the final letters.
'with' means one lot of letters go next to another.
'my boss?' becomes 'ed' (abbreviation for editor, the setter's boss).
The last letters of 'trigger meeting' are 'rg'.
'u'+'rg'+'ed'='URGED'
(Other definitions for urged that I've seen before include "Exhorted or prodded" , "Egged on" , "Pressed" , "Incited" , "Strongly advised" .)