He's leaving Sheridan at the lowest point (5)
I believe the answer is:
nadir
'lowest point' is the definition.
(I've seen this in another clue)
'he's leaving sheridan at' is the wordplay.
'NADIR' is hidden backwards in amongst the letters.
But, I'm not sure how the hidden word is indicated.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for nadir that I've seen before include "Given lowest place" , "Low-water mark" , "Dinar (anag.)" , "The lowest point of anything" , "businessman formerly escaping justice" .)