Bird from public relations embracing sweetheart (6)
I believe the answer is:
plover
'bird' is the definition.
(plover is a kind of bird)
'public relations embracing sweetheart' is the wordplay.
'public relations' becomes 'pr'.
'embracing' means one lot of letters goes inside another.
'sweetheart' becomes 'love' (I've seen this before).
'pr' going around 'love' is 'PLOVER'.
'from' acts as a link.
(Other definitions for plover that I've seen before include "Lapwing, for example" , "Lapwing-like bird" , "Wader" , "Shorebird with pointed wings" , "Shore bird with long pointed wings" .)