Also fascinated by article on pub acquisition (4,3,7)
I believe the answer is:
into the bargain
'also' is the definition.
(I've seen this before)
'fascinated by article on pub acquisition' is the wordplay.
'fascinated by' becomes 'into' (I've seen this before).
'article' becomes 'the' (the 'definite article' part of speech).
'on' means one lot of letters go next to another.
'pub' becomes 'bar' (I've seen this before).
'acquisition' becomes 'gain'.
'into'+'the'+'bar'+'gain'='INTO THE BARGAIN'
(Other definitions for into the bargain that I've seen before include "as well" , "Also" .)