Huge romantic also getting sloppy (12)
I believe the answer is:
astronomical
'huge' is the definition.
(I've seen this before)
'romantic also getting sloppy' is the wordplay.
'getting' is a charade indicator (letters next to each other).
'sloppy' indicates an anagram.
'romantic'+'also'='romanticalso'
'romanticalso' is an anagram of 'ASTRONOMICAL'.
(Other definitions for astronomical that I've seen before include "Of the study of stars" , "Really, really big" , "Absolutely huge, in a heavenly way" , "Inconceivably large" , "Tremendous" .)