Visionary having short time in charge after Vespasian? (8)
I believe the answer is:
romantic
'visionary' is the definition.
(romantic is a kind of visionary)
'short time in charge after vespasian?' is the wordplay.
'short time' becomes 't' (abbreviation for time).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'after' means one lot of letters go next to another.
'vespasian?' becomes 'Roman' (Vespasian was a Roman emperor).
't'+'ic'='tic'
'tic' put after 'roman' is 'ROMANTIC'.
'having' acts as a link.
(Other definitions for romantic that I've seen before include "Amatory" , "Inclined to love" , "Soulful or amorous idealist" , "Passionate" , "Amorous, showing loving feeling" .)