Satisfied yours truly at last (3)
I believe the answer is:
met
'satisfied' is the definition.
(as in 'met the conditions of his contract')
'yours truly at last' is the wordplay.
'yours truly' becomes 'me' (the person that set this crossword).
'last' indicates one should take the final letters.
The last letter of 'at' is 't'.
'me'+'t'='MET'
(Other definitions for met that I've seen before include "Came together, encountered" , "Encountered pro tem" , "Came across - police in London" , "Opera company" , "gathered together" .)