Slather

2 clues
Spread
Lay it on thick
Similar answers:
Aattheraces
Abcislands
Abidebytherules
Abother
Abouther
Aboveallothers
Abovetheweather
Abrother
Abrothertheres
Acidesther
Acrosstheriver
Actorslab
Acumenbrother
Acutaboveothers
Acuttherest
Adamslander
Adayattheraces
Adazelikenoother
Addresslabels
Addtogether