English pop star had left hotel by half eleven (5)
I believe the answer is:
adele
'english pop star' is the definition.
The definition suggests a singular noun which matches the answer.
'had left hotel by half eleven' is the wordplay.
'had' becomes 'd' (in contractions e.g. 'I'd', 'you'd' etc).
'left hotel' becomes 'a' (I can't justify this - if you can you should give a lot more credence to this answer).
'by' says to put letters next to each other.
'half' suggests halving the letters.
'eleven' halved is 'ele'.
'd' put after 'a' is 'ad'.
'ad'+'ele'='ADELE'
Can you help me to learn more?
(Other definitions for adele that I've seen before include "Singer with albums titled 19, 21 and 25" , "Female English singer-songwriter, b. 1988" , "Female singer from London" , "Performer" , "Woman" .)