At hotel, commander gets piece of cake (5)
I believe the answer is:
cinch
'piece of cake' is the definition.
(both can mean something very easy)
'at hotel commander' is the wordplay.
'at' says to put letters next to each other.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'commander' becomes 'C in C' (abbreviation for commander in chief).
'h' after 'cinc' is 'CINCH'.
'gets' is the link.
(Other definitions for cinch that I've seen before include "piece of cake" , "A walk in the park" , "Doddle" , "Something easily done" , "In slang, a certainty or easy task" .)