Not being truthful at home, and not getting up (7)
I believe the answer is:
lyingin
'not being truthful' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'home and not getting up' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'and' means one lot of letters go next to another.
'not getting up' becomes 'lying' ('lie' is the opposite to 'get up').
'in' after 'lying' is 'LYINGIN'.
'at' is the link.
Can you help me to learn more?
(Another definition for lyingin that I've seen is " End of pregnancy".)