Vacuous alderman half gloats that globe indicates the English-speaking countries (11)

'the english-speaking countries' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'vacuous alderman half gloats that globe' is the wordplay.
'vacuous' means to remove the middle letters.
'half' means to take half the letters.
'that globe' becomes 'sphere' (I've seen this before).
'alderman' with its middle taken out is 'an'.
'gloats' with half the letters taken is 'glo'.
'an'+'glo'+'sphere'='ANGLOSPHERE'

'indicates' is the link.

Can you help me to learn more?