Try to persuade some regular guests (5)
I believe the answer is:
argue
'try to persuade' is the definition.
(as in arguing one's point)
'some regular guests' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'ARGUE' is hidden within 'regular guests'.
(Other definitions for argue that I've seen before include "Present the case for" , "Quarrel, row" , "Dispute heatedly" , "Debate, row" , "Contend verbally" .)