Place sect developed — an interesting sight (9)
I believe the answer is:
spectacle
'an interesting sight' is the definition.
'place sect developed' is the wordplay.
'developed' indicates anagramming the letters.
'place'+'sect'='placesect'
'placesect' anagrammed gives 'SPECTACLE'.
(Other definitions for spectacle that I've seen before include "Elaborate and remarkable display" , "sensational event" , "Entertaining sight, they help to see in the plural" , "Impressive public sight" , "Something worth seeing" .)