Worked to get the front lubricated (6)
I believe the answer is:
toiled
'worked' is the definition.
(toiling is a kind of working)
'get the front lubricated' is the wordplay.
'get' means one lot of letters go next to another.
'front' indicates taking the first letters.
'lubricated' becomes 'oiled' ('oil' can be a synonym of 'lubricate').
The initial letter of 'the' is 't'.
't'+'oiled' is 'TOILED'.
'to' acts as a link.
(Other definitions for toiled that I've seen before include "Laboued long and hard" , "Worked laboriously and long" , "Worked incessantly" , "Struggled long and hard" , "Worked long and hard" .)