Flier has hack about hotel (6)
I believe the answer is:
chough
'flier' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'hack about hotel' is the wordplay.
'hack' becomes 'cough' (hack can mean to cough).
'about' is an insertion indicator.
'hotel' becomes 'h' (phonetic alphabet).
'cough' placed around 'h' is 'CHOUGH'.
'has' acts as a link.
Can you help me to learn more?
(Other definitions for chough that I've seen before include "Black bird on Cornish coat of arms" , "Bird of the crow family" , "singer" , "Crow-like bird of cliffs and mountains" .)