Awful hotel is unfriendly (7)
I believe the answer is:
hostile
'unfriendly' is the definition.
(similar in meaning)
'awful hotel is' is the wordplay.
'awful' indicates anagramming the letters.
'hotel'+'is'='hotelis'
'hotelis' with letters rearranged gives 'HOSTILE'.
(Other definitions for hostile that I've seen before include "Belligerent" , "The soil strangely is unfriendly" , "malevolent" , "Bellicose" , "harsh" .)