Crossword clue: a condition (mostly in boys) characterized by behavioral and learning disorders
2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of
adhd
4 letters
wn-def
a condition (mostly in boys) characterized by behavioral and learning disorders