Dress protecting male and female in horror film (3,3)

'horror film' is the definition.
(1980 film)

'dress protecting male and female' is the wordplay.
'dress' becomes 'tog' (synonyms).
'protecting' means one lot of letters goes inside another (inserted letters are held or protected).
'male' becomes 'he' (he refers to a man).
'and' says to put letters next to each other.
'female' becomes 'f' (common abbreviation).
'he'+'f'='hef'
'tog' going around 'hef' is 'THE FOG'.

'in' acts as a link.