Popular and more confident provider of cover (7)
I believe the answer is:
insurer
'provider of cover' is the definition.
(I've seen this before)
'popular and more confident' is the wordplay.
'popular' becomes 'in'.
'and' is a charade indicator (letters next to each other).
'more confident' becomes 'surer' ('sure' can be similar in meaning to 'confident').
'in'+'surer'='INSURER'
(Other definitions for insurer that I've seen before include "one offers chance to cover" , "Provider of cover" , "One providing cover" , "One offering policy for risk" , "Underwriter, risk taker" .)