Wide street lacking a place to meet (5)
I believe the answer is:
venue
'place to meet' is the definition.
(I've seen this before)
'wide street lacking a' is the wordplay.
'wide street' becomes 'avenue' (I've seen this before).
'lacking' is a deletion indicator.
'avenue' with 'a' taken away is 'VENUE'.
(Other definitions for venue that I've seen before include "Something is happening here" , "Chosen location" , "The place where something happens" , "place to meet" , "Here we gather" .)