Someone with halo certainly creating problems for viewers (5)
I believe the answer is:
styes
'problems for viewers' is the definition.
('eyes' might whimsically be called 'viewers')
'someone with halo certainly' is the wordplay.
'someone with halo' becomes 'st' (saint).
'certainly' becomes 'yes' (I've seen this before).
'st'+'yes'='STYES'
'creating' is the link.
(Other definitions for styes that I've seen before include "They make it difficult to see" , "Eyesores" , "Pig pens" , "Eye troubles" , "Eye infections" .)