Go round tree that's meretricious (6)
I believe the answer is:
trashy
'meretricious' is the definition.
('trashy' can be a synonym of 'meretricious')
'go round tree' is the wordplay.
'go' becomes 'try' (I've seen this before**).
'round' means one lot of letters goes inside another.
'tree' becomes 'ash' (ash tree is a kind of tree).
'try' going around 'ash' is 'TRASHY'.
'that's' is the link.
(Other definitions for trashy that I've seen before include "Poorly made" , "Cheap - garish" , "As rubbish" , "Shoddy and worthless" , "Of poor quality" .)