Moment to introduce good news article initially evoking pity (8)
I believe the answer is:
poignant
'evoking pity' is the definition.
(poignant can mean touching or sad)
'moment to introduce good news article initially' is the wordplay.
'moment' becomes 'point' (a point in time).
'to introduce' means one lot of letters goes inside another (to introduce to can mean to insert or include).
'initially' indicates taking the first letters.
The first letters of 'good news article' is 'gna'.
'point' enclosing 'gna' is 'POIGNANT'.
(Other definitions for poignant that I've seen before include "Touching - gin on tap (anag)" , "Painfully emotional" , "Painful" , "Evoking sadness or regret" , "Sharply upsetting" .)