A bachelor ecstatic, distracted (6)
I believe the answer is:
absent
'distracted' is the definition.
(absent-minded)
'a bachelor ecstatic' is the wordplay.
'bachelor' becomes 'B' (abbreviation e.g. BA=Bachelor of Arts).
'ecstatic' becomes 'sent' (send can mean to stimulate or excite).
'a'+'b'+'sent'='ABSENT'
(Other definitions for absent that I've seen before include "Not where one should be" , "Not at a specified place" , "elsewhere" , "Not attending" , "Not present - vacuous" .)