Totally chilled, at home before ten, taking in beer and a film (3,4,2,4)

'a film' is the definition.
(Ice Cold in Alex is a 1958 film)

'totally chilled at home before ten taking in beer' is the wordplay.
'totally chilled' becomes 'ice cold' (ice cold means completely chilled).
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'before ten' becomes 'x' (Roman numeral. I am not sure about the 'before' bit.).
'taking in' is an insertion indicator.
'beer' becomes 'ale' (type of beer).
'in'+'x'='inx'
'inx' placed around 'ale' is 'inalex'.
'icecold'+'inalex'='ICE COLD IN ALEX'

'and' acts as a link.