Raise children -- no blessings at heart? (7)
I believe the answer is:
ennoble
'raise' is the definition.
(I know that ennoble is a more specific form of the action raise)
'children no blessings at heart?' is the wordplay.
'at heart?' indicates a hidden word (letters hidden in the heart of the clue).
'ENNOBLE' is hidden in the letters of 'children no blessings'.
(Other definitions for ennoble that I've seen before include "Give peerage to" , "Exalt" , "Elevate to peerage" , "Turn to peer" , "Distinguish" .)