German article on, say, lust and introduction to eroticism is indefinitely postponed (4,3)
I believe the answer is:
sine die
'indefinitely postponed' is the definition.
(Latin term meaning no date for continuation set)
'german article on say lust and introduction to eroticism' is the wordplay.
'german article' becomes 'die'.
'on' means one lot of letters go next to another.
'say lust' becomes 'sin' (lust is a deadly sin).
'and' means one lot of letters go next to another.
'introduction to' says to take the initial letters (I've seen 'introductions to' mean this).
The initial letter of 'eroticism' is 'e'.
'sin'+'e'='sine'
'die' put after 'sine' is 'SINE DIE'.
'is' is the link.
(Other definitions for sine die that I've seen before include "With no date agreed" , "without a date" , "Postponed indefinitely (L.)" , "Indefinitely (Latin, as applied to sporting suspensions)" , "For an indefinite period (Latin)" .)