Display facilities when in Oxford, perhaps (8)
I believe the answer is:
showcase
'display' is the definition.
(I've seen this before)
'facilities when in oxford perhaps' is the wordplay.
'facilities' becomes 'wc' (water closet).
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'in' indicates putting letters inside.
'oxford perhaps' becomes 'shoe' (oxford is a kind of shoe).
'wc'+'as'='wcas'
'wcas' inserted within 'shoe' is 'SHOWCASE'.
(Other definitions for showcase that I've seen before include "Exhibit, display" , "exhibition place" , "Museum display unit" , "Play" , "to suit trophy-holder" .)