5a. Drink and smoke turning into a layabout
SLUGGARD
11a. Drink, as tea may be
IN ONE'S CUPS
24a. Courteous chap born not on the right side of the tracks
MANNERLY
25a. The epitome of coolness, one copper shed burden
CUMBER
4d. He's left awful Jack, who's gone on an excursion?
TRIPPER
14d. Burden managing director with record lifting the biggest prize
GOLD MEDAL
23d. Ordinary goat's milk cheese, mostly acceptable.
CHEVRON
Parses for the above please.