What may replace toes here (8)
I believe the answer is:
shoetree
'what may replace toes here' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'replace toes here' is the wordplay.
'replace' indicates anagramming the letters (I've seen 'replaced' mean this).
'toes'+'here'='toeshere'
'toeshere' is an anagram of 'SHOETREE'.
Can you help me to learn more?
(Other definitions for shoetree that I've seen before include "A shaped block for holding footwear" , "Shaped block for keeping footwear in condition" , "It preserves the shape of footwear" , "Device put into footwear to maintain shape" , "Device to keep footwear in good shape" .)