Strike gold! 1,001 dollars at random (3-2-4)
I believe the answer is:
hit-or-miss
'at random' is the definition.
(thesaurus)
'strike gold 1001 dollars' is the wordplay.
'strike' becomes 'hit' ('hit' can be a synonym of 'strike').
'gold' becomes 'or' ('or' is the heraldic name for gold).
'1001' becomes 'mi' (I've seen this in other clues).
'dollars' becomes 'ss'.
'hit'+'or'+'mi'+'ss'='HIT-OR-MISS'
(Other definitions for hit-or-miss that I've seen before include "Haphazard, random" , "Of method, erratic or random" .)