Exaggerated what lovers do when excited (8)
I believe the answer is:
oversold
'exaggerated' is the definition.
(I've seen this before)
'lovers do when excited' is the wordplay.
'when excited' indicates an anagram.
'lovers'+'do'='loversdo'
'loversdo' anagrammed gives 'OVERSOLD'.
'what' acts as a link.
(Other definitions for oversold that I've seen before include "Did excessive business" , "Likely to disappoint" , "Exaggerated the merits of (something)" .)