Hectors drunk on chocolate, day and night (6-3-5)
I believe the answer is:
around-the-clock
'hectors drunk' is the definition.
I can't judge whether this defines the answer.
'chocolate day and night' is the wordplay.
'chocolate' becomes 'a' (I can't justify this - if you can you should believe this answer much more).
'day and night' becomes 'round the clock' (I've seen this before).
'a'+'roundtheclock'='AROUND-THE-CLOCK'
'on' acts as a link.
Can you help me to learn more?
(Another definition for around-the-clock that I've seen is " All day".)