Be troubled and sure upset about the noisy music (6)

I believe the answer is:

suffer

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'be' is the definition.
(suffering is a kind of being)

'sure upset about the noisy music' is the wordplay.
'upset' is an anagram indicator.
'about' is an insertion indicator.
'the noisy' becomes 'f'.
'music' becomes 'f' ().
'sure' anagrammed gives 'suer'.
'f'+'f'='ff'
'suer' enclosing 'ff' is 'SUFFER'.

'troubled and' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for suffer that I've seen before include "Undergo pain or grief" , "Endure - permit" , "Endure - experience" , "Experience hurt" , "Put up with" .)

I've seen this clue in the Evening Standard.

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