Happen to roll up with a bigwig? (6)
I believe the answer is:
chance
'happen' is the definition.
(chancing is a kind of happening)
'roll up with a bigwig?' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'an' and 'an' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for chance that I've seen before include "Luck -a fine thing?" , "Probability" , "I wish (but it won't happen!)" , "Possibility - opportunity" , "The way things happen, luck" .)