Having paid it, can you get back to bed on time? (4)
I believe the answer is:
debt
'having paid it can you' is the definition.
I can't tell whether this definition defines the answer.
'back to bed on time?' is the wordplay.
'back' is a reversal indicator.
'on time?' becomes 't' (abbreviation. I am not sure about the 'on' bit.).
'bed' in reverse letter order is 'deb'.
'deb'+'t'='DEBT'
'get' is the link.
Can you help me to learn more?
(Other definitions for debt that I've seen before include "Financial problem?" , "Financial liability" , "Amount owing" , "outstanding" , "Amount owed" .)