Shape of fancy hotel room I'd booked originally (8)
I believe the answer is:
rhomboid
'shape' is the definition.
(rhomboid is a kind of shape)
'fancy hotel room i'd booked originally' is the wordplay.
'fancy' indicates an anagram.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'originally' says to take the initial letters.
The initial letter of 'booked' is 'b'.
'h'+'room'+'id'+'b'='hroomidb'
'hroomidb' is an anagram of 'RHOMBOID'.
'of' is the link.
(Other definitions for rhomboid that I've seen before include "diamond" , "Form of parallelogram" , "Parallelogram, but not square" , "Describing a type of parallelogram" , "Shape" .)