Dislike dais - heading off (5)
I believe the answer is:
odium
'dislike' is the definition.
(I've seen this before)
'dais heading off' is the wordplay.
'dais' becomes 'podium' ('podium' can be a synonym of 'dais').
'heading off' means to remove the first letter.
'podium' with its first letter removed is 'ODIUM'.
(Other definitions for odium that I've seen before include "Widespread hatred or disgust felt towards someone" , "Offensiveness" , "disapprobation" , "shame!" , "Widespread dislike and disapproval" .)