Joint that is primarily raunchy and more disreputable (7)

'more disreputable' is the definition.
('seamy' can be similar in meaning to 'disreputable')

'joint that is primarily raunchy' is the wordplay.
'joint' becomes 'seam' (seam is a kind of joint).
'that is' becomes 'ie' (synonyms).
'primarily' says to take the initial letters.
The initial letter of 'raunchy' is 'r'.
'seam'+'ie'+'r'='SEAMIER'

'and' is the link.