Might pause quickly for early meeting (5,9)
I believe the answer is:
power breakfast
'early meeting' is the definition.
(I've seen this before)
'might pause quickly' is the wordplay.
'might' becomes 'power' (being mighty).
'pause' becomes 'break' (break is a kind of pause).
'quickly' becomes 'fast' (synonyms).
'power'+'break'+'fast'='POWER BREAKFAST'
'for' acts as a link.
(Other definitions for power breakfast that I've seen before include "Influence, by chance, quick early business meeting" , "summit early?" .)