A servant to clean your car? (5)
I believe the answer is:
valet
'a servant' is the definition.
(valet is a kind of servant)
'your car?' is the wordplay.
'your' becomes 'vale' (I can't justify this - if you can you should give a lot more credence to this answer).
'car?' becomes 't'.
'vale'+'t'='VALET'
'to clean' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for valet that I've seen before include "Gentleman's attendant" , "Personal male assistant" , "Personal manservant" , "dresser" , "Male servant" .)