In moving, lose footrest (6)
I believe the answer is:
insole
'footrest' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'in moving lose' is the wordplay.
'moving' indicates an anagram.
'lose' is an anagram of 'sole'.
'in'+'sole'='INSOLE'
Can you help me to learn more?
(Other definitions for insole that I've seen before include "Padding in a shoe" , "Inner part of shoe" , "Oxford's content" , "found in boot" , "Part of Oxford perhaps" .)