Patter that places this loosely (5,5)
I believe the answer is:
sales pitch
'patter' is the definition.
(thesaurus)
'places this loosely' is the wordplay.
'loosely' is an anagram indicator.
'places'+'this'='placesthis'
'placesthis' is an anagram of 'SALES PITCH'.
'that' acts as a link.
(Other definitions for sales pitch that I've seen before include "bid to make one part with money" , "Market stall" , "that's delivered by rep" , "Sharks can be seen on this" , "Vendor's spiel" .)