Early work might involve meeting with fellow in steak bar, possibly (5,9)
I believe the answer is:
power breakfast
'early work' is the definition.
(meeting held over breakfast)
'might involve meeting with fellow in steak bar possibly' is the wordplay.
I cannot really see how this works, but
'might' could be 'power' (being mighty) and 'power' is present in the answer.
'fellow' could be 'f' (abbreviation - of a society etc.) and 'f' is located in the answer.
'bar' could be 't' (T-bar is a part of a ski lift) and 't' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for power breakfast that I've seen before include "summit early?" , "Influence, by chance, quick early business meeting" .)