Take in the sun (4)
I believe the answer is:
bask
'take in the sun' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bask that I've seen before include "Lie in warmth" , "Lie in sunshine" , "Soak up sun" , "Sunbathe" , "Lie in the sun" .)