Vague padre, dismissing pa and girl (6)
I believe the answer is:
dreamy
'vague' is the definition.
(I've seen this before)
'padre dismissing pa and girl' is the wordplay.
'dismissing' suggests deleting specific letters.
'and' means one lot of letters go next to another.
'girl' becomes 'amy'.
'padre' with 'pa' taken out is 'dre'.
'dre'+'amy'='DREAMY'
(Other definitions for dreamy that I've seen before include "Fantastic" , "Dishy" , "quite impractical" , "My dear (anag.)" , "Lovely" .)