Five beset by crazed zombies endlessly — in this type of film? (1-5)

'this type of film?' is the definition.
(B-movie is a type of film)

'five beset by crazed zombies endlessly' is the wordplay.
'five' becomes 'V' (Roman numeral).
'beset by' means one lot of letters goes inside another ('beset' could historically mean 'cover').
'crazed' indicates anagramming the letters (a crazy order of the letters).
'endlessly' means to look at the middle letters (the ends of the words are removed).
The centre of 'zombies' is 'ombie'.
'ombie' is an anagram of 'bmoie'.
'v' going within 'bmoie' is 'B-MOVIE'.

'in' is the link.