Sunday Times cryptic crossword no. 4273 April 20th?

Question

1a Host entertaining a hundred with s**y companion? (3,5)

A - - - A - D -

2d Conventions fictional detective finally turned upside down (5)

- - R - S

The first letter of 2d is the third letter of 1a.

Any ideas?

Answer 1

1a) ARM CANDY

ARMY (host) AND C (Roman numeral: 100), anagrammed

2d) MORES

Detective Chief Inspector Endeavour Morse is a fictional character in a series of thirteen detective novels by British author Colin Dexter, as well as the 33 episode television series produced by Central Independent Television from 1987–2000.  Reverse the last 2 letters (finally turned upside down), gives MORES - which are social norms or conventions.

Hope this helps!