Pleased about having passed by (7)
I believe the answer is:
elapsed
'passed by' is the definition.
(I've seen this before)
'pleased about' is the wordplay.
'about' indicates anagramming the letters.
'pleased' is an anagram of 'ELAPSED'.
'having' acts as a link.
(Other definitions for elapsed that I've seen before include "Passed, of time" , "Went by" , "Pleased (anag.)" , "Expired" , "slipped away" .)