Are such seats higher at the extremity? (3-2)
I believe the answer is:
tip-up
'are such seats' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs sometimes mean the same thing.
'higher at the extremity?' is the wordplay.
'higher' becomes 'up'.
'at' means one lot of letters go next to another (I've seen this in other clues).
'the extremity?' becomes 'tip' (tip is a kind of extremity).
'up' after 'tip' is 'TIP-UP'.
Can you help me to learn more?
(Other definitions for tip-up that I've seen before include "(Of seat) constructed so as to be lifted" , "Overbalance" .)