Reveal: There 10 words in the grid that start with the name for a male animal- 1A COB, 16A TOM, 17A HART, 23A RAM, 26A JACK, 29A COCK, 32A STAG, 41A HOB (I didn’t know this was a thing), 43A BUCK, 49A BOAR. Since they come first in the words, they are ALPHA MALES, which is spelled out using the first letters of the clues for these words.