Not up yet, extremely lazy at home with drink (5,2)
I believe the answer is:
lying in
'not up yet' is the definition.
'extremely lazy at home with drink' is the wordplay.
'extremely' suggests removing the centre.
'at home' becomes 'in' ('in' can be similar in meaning to 'at home').
'with' is a charade indicator (letters next to each other).
'drink' becomes 'gin' (gin is a kind of drink**).
'lazy' with its middle removed is 'ly'.
'ly'+'in'+'gin'='LYING-IN'
(Other definitions for lying in that I've seen before include "Staying abed - confined in childbirth" , "being lazy" , "confinement" .)