Terry's broken-down wagon (5)

I believe the answer is:

wogan

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'terry's' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'broken-down wagon' is the wordplay.
'broken down' is an anagram indicator.
'wagon' is an anagram of 'WOGAN'.

Can you help me to learn more?

(Other definitions for wogan that I've seen before include "Terry - - (TV, radio)" , "Sir Terry - - , broadcaster" .)

I've seen this clue in the Evening Standard.

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