Stunned lawyer getting letter (5)
I believe the answer is:
dazed
'stunned' is the definition.
('daze' can be a synonym of 'stun')
'lawyer getting letter' is the wordplay.
'lawyer' becomes 'da' (D.A. is an example).
'getting' means one lot of letters go next to another.
'letter' becomes 'zed' (zed is a kind of letter**).
'da'+'zed'='DAZED'
(Other definitions for dazed that I've seen before include "Stupefied" , "almost out" , "In stunned confusion" , "Seeing stars?" , "Groggy" .)