Is rodent turning up bones? (5)
I believe the answer is:
tarsi
'bones?' is the definition.
(I've seen this before)
'is rodent turning up' is the wordplay.
'rodent' becomes 'rat' (rat is a kind of rodent).
'turning up' says the letters should be written in reverse.
'is'+'rat'='israt'
'israt' in reverse letter order is 'TARSI'.
(Other definitions for tarsi that I've seen before include "Foot bones" , "Ankle bones" , "parts of leg" , "collections of bones?" , "Bones of the ankles and heels" .)