Down-to-earth supporters (4)
I believe the answer is:
feet
'supporters' is the definition.
(your feet support your body)
'down-to-earth' is the wordplay.
I cannot really see how this works, but
'earth' could be 'e' and 'e' is found in the answer.
The remaining letters 'fet' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for feet that I've seen before include "Unit used to measure" , "Imperial units of length" , "supporters?" , "Old measures - that fill shoes" , "Body parts; lengths" .)