Reassess the ground in segment of bowling green (7)
I believe the answer is:
rethink
'reassess' is the definition.
The definition and answer can be both related to thinking as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'the ground in segment of bowling green' is the wordplay.
'ground' is an anagram indicator ('grind' the letters into a new form).
'in' means one lot of letters goes inside another.
'segment of bowling green' becomes 'rink' (I can't justify this - if you can you should believe this answer much more).
'the' with letters rearranged gives 'eth'.
'eth' going within 'rink' is 'RETHINK'.
Can you help me to learn more?
(Other definitions for rethink that I've seen before include "Fresh ideas" , "another assessment" , "Consider afresh" , "Take another approach" , "Another consideration" .)