American city without a park (6)
I believe the answer is:
settle
'park' is the definition.
(thesaurus)
'american city without a' is the wordplay.
'american city' becomes 'seattle' (I've seen this before).
'without' suggests deleting specific letters.
'seattle' with 'a' taken out is 'SETTLE'.
(Other definitions for settle that I've seen before include "Establish, compose" , "rest > put in order" , "reach a decision" , "perch" , "Fix; reside" .)