It's impossible for me to do that

ICANT

Think of a phrase you might say when you're unable to lift something heavy or reach a high shelf.

The clue "It's impossible for me to do that" is a direct play on the phrase "I can't," which is exactly how the answer sounds when spoken aloud. The answer "ICANT" simply removes the space between the words, turning the spoken contraction into a single word. This is a straightforward example of how crosswords sometimes use casual speech or contractions as wordplay.