Wherein tip-up seats could be appropriate (3)
I believe the answer is:
pit
'appropriate' is the definition.
Although both the answer and definition are verbs in their base form, I can't understand how they can define each other.
'wherein tip-up seats could' is the wordplay.
'tip' anagrams to 'PIT'.
Though, I'm not sure how this is indicated.
'be' acts as a link.
Can you help me to learn more?
(Other definitions for pit that I've seen before include "Sizeable hole in the ground" , "Large deep hole in the ground" , "Where the orchestra sits at an opera" , "Hellhole?" , "Portland stone" .)