Stake blanched by the sun, perhaps (4)
I believe the answer is:
pale
I believe this clue is a double definition.
'stake' is the first definition.
(pale can mean a wooden stake or post)
'blanched by the sun perhaps' is the second definition.
(made pale by the sun)
(Other definitions for pale that I've seen before include "picket" , "Light-coloured" , "Feeble - wan" , "Lightly coloured" , "beyond which one is out of line?" .)