Characters from gang in a lot of chest pain (7)

I believe the answer is:

anginal

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

'chest pain' is the definition.
'anginal' can be an answer for 'pain' (I have seen 'Severe pain' mean 'anginal' so perhaps 'pain' could also mean 'anginal'). I am not sure about the 'chest' bit.

'characters from gang in a lot' is the wordplay.
'characters from' indicates the answer is hidden within the clue.
'ANGINAL' can be found hidden inside 'gang in a lot'.

'of' is the link.

Can you help me to learn more?

(Another definition for anginal that I've seen is " Severe pain".)

I've seen this clue in The Independent.

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