Trumpeter, one going up high (5)

I believe the answer is:

jumbo

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This could be a double definition.

'trumpeter one' is the first definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

'going up high' is the second definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

Can you help me to learn more?

(Other definitions for jumbo that I've seen before include "Extra large size" , "Elephant sized?" , "Owner of trunk" , "Immense" , "Unusually large" .)

I've seen this clue in The Telegraph.

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