Clue: Put two and two together, say

Answer: ADD

Length: 3

---

Similar Clues:

• Twin-___ (twofers, in adspeak) (PAKS with 4 letters)
• Half of a 1991 movie twosome (THELMA with 6 letters)
• Group in twos (PAIRUP with 6 letters)
• Twosome, tabloid-style (ITEM with 4 letters)
• Arranged in twos (PAIRED with 6 letters)
• Operatic twosome (DUET with 4 letters)
• It's often used in twos (ASPIRIN with 7 letters)
• No. twos (VPS with 3 letters)
• One of Tennessee's twosomes (ENS with 3 letters)
• Candy that comes in twos (TWIX with 4 letters)