Dallas clan: some flew in Grumman (5)
I believe the answer is:
ewing
'dallas clan' is the definition.
(I've seen this in another clue)
'some flew in grumman' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'EWING' is hidden in the letters of 'flew in grumman'.
(Other definitions for ewing that I've seen before include "Oil family" , "Fictional oil baron" .)