Tell fibs at home and stay in bed (3-2)
I believe the answer is:
lie-in
'stay in bed' is the definition.
(I've seen this before)
'tell fibs at home' is the wordplay.
'tell fibs' becomes 'lie' (I've seen this in another clue).
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'lie'+'in'='LIE-IN'
'and' is the link.
(Other definitions for lie-in that I've seen before include "Extended time in bed in the morning" , "That extra hour or so in bed?" , "Extended bedtime!" , "Extra zeds in the morning" , "Period in bed longer than usual" .)