Spoil appearance of part of the cafe, disabled needing a lift (6)
I believe the answer is:
deface
'spoil appearance of' is the definition.
'part of the cafe disabled needing a lift' is the wordplay.
'part of' indicates a hidden word.
'needing a lift' is a reversal indicator (in a down clue, letters go up).
'ecafed' is hidden in the letters of 'the cafe disabled'.
'ecafed' written backwards gives 'DEFACE'.
(Other definitions for deface that I've seen before include "blemish" , "Mar or spoil the appearance of" , "Wantonly spoil the look of" , "ruin" , "Spoil surface of, mar" .)