Spill beer on dress (6)
I believe the answer is:
enrobe
'dress' is the definition.
(I know that enrobe is a type of fig up)
'spill beer on' is the wordplay.
'spill' indicates anagramming the letters (letters spilled or knocked around).
'beer'+'on'='beeron'
'beeron' is an anagram of 'ENROBE'.
(Other definitions for enrobe that I've seen before include "Fancy" , "put on gown" , "put on formally ..." , "make investment?" , "Dress, clothe, invest" .)