Central sections of park tidy and dry (4)
I believe the answer is:
arid
'dry' is the definition.
(similar in meaning)
'central sections of park tidy' is the wordplay.
'central sections of' indicates the central letters.
'tidy' becomes 'id' (I can't explain this - if you can you should believe this answer much more).
The central letters of 'park' are 'ar'.
'ar'+'id'='ARID'
'and' is the link.
(Other definitions for arid that I've seen before include "Parched with heat" , "Dry, devoid of interest" , "Without much rainfall" , "Parched and barren" , "Lacking sufficient rainfall" .)