Each rebus clues a winner of exactly two of the three legs of the Triple Crown of Thoroughbred Racing: The Kentucky Derby, Preakness Stakes, or Belmont Stakes.
1976 - BOLDFORBES | KD, BS |
2014 - CALIFORNIACHROME | KD, PS |
1999 - CHARISMATIC | KD, PS |
1967 - DAMASCUS | PS, BS |
1991 - HANSEL | PS, BS |
1953 - NATIVEDANCER | PS, BS |
1984 - SWALE | KD, BS |
We reorder the answers by the year in which the horse competed and take the name of the horse that won the leg of the Triple Crown that the answer horse failed to win:
DARKSTAR
PROUDCLARION
ELOCUTIONIST
GATEDANCER
STRIKETHEGOLD
LEMONDROPKID
TONALIST
Indexing into these names with the numbers next to the rebuses gives the answer, TOUGHEN