Magnate's time over there securing company (6)
I believe the answer is:
tycoon
'magnate's' is the definition.
(synonyms)
'time over there securing company' is the wordplay.
'time' becomes 't' (abbreviation).
'over there' becomes 'yon' (archaic word meaning 'over there').
'securing' is an insertion indicator.
'company' becomes 'co' (abbreviation).
'yon' going around 'co' is 'ycoon'.
't'+'ycoon'='TYCOON'
(Other definitions for tycoon that I've seen before include "Entrepreneur" , "Business magnate or mogul" , "Big noise" , "Rich and powerful businessman" , "Magnate, wealthy businessman" .)