Stuffing own loot casually under child's bed (6,4)
I believe the answer is:
cotton wool
'stuffing' is the definition.
(eg in stuffed toys)
'own loot casually under child's bed' is the wordplay.
'casually' indicates an anagram (I've seen this in other clues).
'under' says to put letters next to each other.
'child's bed' becomes 'cot' (I've seen this before).
'own'+'loot'='ownloot'
'ownloot' with letters rearranged gives 'tonwool'.
'tonwool' after 'cot' is 'COTTON-WOOL'.
(Other definitions for cotton wool that I've seen before include "protective wrapping?" , "Absorbent padding" , "Light, fluffy stuff from plant" , "Fluffy wadding" , "Natural fibre" .)