Ground with a rather poor transport hub (8,7)

I believe the answer is:

heathrow airport

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

'transport hub' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'ground with a rather poor' is the wordplay.
'ground' indicates an anagram (grind the letters ).
'with'+'a'+'rather'+'poor'='witharatherpoor'
'witharatherpoor' anagrammed gives 'HEATHROW AIRPORT'.

Can you help me to learn more?

(Another definition for heathrow airport that I've seen is " Busy place".)

I've seen this clue in The Telegraph.

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