Footwear placed outside toilet when giving display (8)
I believe the answer is:
showcase
'display' is the definition.
(I've seen this before)
'footwear placed outside toilet when' is the wordplay.
'footwear' becomes 'shoe' (shoe is a kind of footwear).
'placed outside' means one lot of letters goes inside another.
'toilet' becomes 'W.C.' (W.C. is an example).
'when' becomes 'as'.
'wc'+'as'='wcas'
'shoe' going around 'wcas' is 'SHOWCASE'.
'giving' acts as a link.
(Other definitions for showcase that I've seen before include "Display cabinet" , "Play" , "Exhibit, display" , "exhibition place" , "to suit trophy-holder" .)