clue in
phrasal verbwithclueverbuk/kluː/us/kluː/present participleclueingorcluing|past tense and past participleclued
USinformaltostarttorealizeorunderstandsomething:
Thephysicianondutycluedintowhat could bewrongwith me while taking mymedicalhistory.
Even though I'd told myhusbandI was having amakeover, he nevercluedin.