Initially, proprietor left one worker easily influenced (6)
I believe the answer is:
pliant
'easily influenced' is the definition.
(I've seen this before)
'initially proprietor left one worker' is the wordplay.
'initially' suggests taking the first letters.
'left one' becomes 'li' (left abbreviation plus 1).
'worker' becomes 'ant' (worker is a type of ant).
The first letter of 'proprietor' is 'p'.
'p'+'li'+'ant'='PLIANT'
(Other definitions for pliant that I've seen before include "Plastic" , "Accommodating" , "Malleable, flexible" , "Bendable" , "Tractable" .)