Big and regal, perhaps (5)
I believe the answer is:
large
'big' is the definition.
(I know that big can be written as large)
'regal perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'regal' with letters rearranged gives 'LARGE'.
'and' is the link.
(Other definitions for large that I've seen before include "Great being regal" , "Titanic" , "Big, great" , "Big, outsize" , "Big < burly" .)