Piece of land has been hired (5)
I believe the answer is:
islet
'piece of land' is the definition.
(I've seen this before)
'been hired' is the wordplay.
'been' becomes 'is' (I can't explain this - if you can you should believe this answer much more).
'hired' becomes 'let' (I've seen this before).
'is'+'let'='ISLET'
'has' is the link.
Can you help me to learn more?
(Other definitions for islet that I've seen before include "Cay, for example" , "One of Langerhans's" , "Small piece of land surrounded by water" , "Rockall, for example" , "Detached bit of land" .)