inaptness crossword clue

 The most likely answer to the crossword clue "inaptness" is UNSUITABILITY. Unsuitability means being unfit or inappropriate for a particular purpose. It can also mean being lacking in the necessary qualities or skills to do something.

Other possible answers to the clue include:

INAPPROPRIATENESS

INAPTITUDE

MALADROITNESS

UNFITNESS

However, these words are all more specific than UNSUITABILITY, which is the most general term for being unfit or inappropriate.

Please let me know if you have any other questions.