Crossword Genius

Summit just too much for this climber? (3)

Ross

I believe the answer is:

pea

I'm a little stuck... Click here to teach me more about this clue!

'this climber?' is the definition.
(the pea plant is a climbing plant)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for pea that I've seen before include "Vegetable in a whistle" , "registered by princess in bed" , "food item" , "Edible green seed" , "Tiny stone" .)

I've seen this clue in The Times.
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