Germaine gets around as an engineer (7)
I believe the answer is:
greaser
'an engineer' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'germaine gets around as' is the wordplay.
'germaine' becomes 'greer' (I can't explain this - if you can you should give a lot more credence to this answer).
'gets around' is an insertion indicator.
'greer' enclosing 'as' is 'GREASER'.
Can you help me to learn more?
(Other definitions for greaser that I've seen before include "(Unskilled) mechanic" , "Mechanic - sycophant" , "Ship's engineer; motor mechanic" , "Biker" , "An unctuous individual" .)