Tall palm found in a park area (5)
I believe the answer is:
areca
'tall palm' is the definition.
(I've seen this in another clue)
'a park area' is the wordplay.
'park' becomes 'rec' (short for recreation ground).
'area' becomes 'a' (maths abbreviation).
'a'+'rec'+'a'='ARECA'
'found in' acts as a link.
(Other definitions for areca that I've seen before include "Tall palm tree" , "Palm with red nuts" , "palm-tree" , "Tropical palm" , "Sort of nut" .)