Rubbish written about hotel do (6)
I believe the answer is:
thrash
'do' is the definition.
(both can mean to attack or harm someone)
'rubbish written about hotel' is the wordplay.
'rubbish' becomes 'trash' ('trash' can be a synonym of 'rubbish'**).
'written about' indicates putting letters inside.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'trash' enclosing 'h' is 'THRASH'.
(Other definitions for thrash that I've seen before include "Decisively beat" , "Beat with stick or whip" , "Punish" , "Beat heavily, perhaps with whip" , "Administer severe beating to" .)