Making boast about hotel feels like an anticlimax (6)
I believe the answer is:
bathos
'an anticlimax' is the definition.
('bathos' can be a synonym of 'anticlimax')
'making boast about hotel' is the wordplay.
'making' indicates an anagram.
'about' indicates putting letters inside.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'boast' is an anagram of 'batos'.
'batos' enclosing 'h' is 'BATHOS'.
'feels like' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for bathos that I've seen before include "Change from serious to trivial (in literature)" , "Unintentional slip from serious to trivial mood" , "Ludicrous descent from serious to trivial" , "descent into triviality" , "Unintentional lowering of tone" .)