Middle section of Watcher is high value (7)
I believe the answer is:
cherish
'middle section' is the definition.
Although both the answer and definition are verbs in their base form, I don't see how one could define the other.
'of watcher is high value' is the wordplay.
'of' says the answer is hidden in the clue.
'CHERISH' is hidden within 'watcher is high value'.
Can you help me to learn more?
(Other definitions for cherish that I've seen before include "Nurse" , "Hold dear, keep in one's heart" , "Hold dear -- he's rich (anag)" , "Love" , "Foster" .)