Those covering popular and confident Republican succeeded (8)

I believe the answer is:

insurers

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

'popular and confident republican succeeded' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'and' is a charade indicator (letters next to each other).
'confident' becomes 'sure' (similar in meaning).
'republican' becomes 'R' (abbreviation).
'succeeded' becomes 's' (genealogical abbreviation).
'in'+'sure'+'r'+'s'='INSURERS'

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