A bit worried about old US lawman's CV? (7)
I believe the answer is:
biodata
'cv?' is the definition.
(biodata can mean someone's curriculum vitae)
'a bit worried about old us lawman's' is the wordplay.
'worried' indicates an anagram.
'about' is an insertion indicator.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'us lawman' becomes 'da' (district attorney).
'a'+'bit'='abit'
'abit' with letters rearranged gives 'bita'.
'o'+'da'='oda'
'bita' placed around 'oda' is 'BIODATA'.
(Other definitions for biodata that I've seen before include "Biographical details" , "Facts of life" .)