Drink at home, beginning to enjoy lying (6)
I believe the answer is:
supine
'lying' is the definition.
(thesaurus)
'drink at home beginning to enjoy' is the wordplay.
'drink' becomes 'sup' (I've seen this before**).
'at home' becomes 'in' ('in' can be similar in meaning to 'at home').
'beginning to' suggests taking the first letters.
The initial letter of 'enjoy' is 'e'.
'sup'+'in'+'e'='SUPINE'
(Other definitions for supine that I've seen before include "Recumbent" , "Laid-back" , "Flat on one's back" , "Lying face upwards, indolent" , "Unresisting" .)