Answer: attentive

AnswerCrossword Clue
ATTENTIVEAll ears
ATTENTIVEMindful
ATTENTIVEConsiderate.
ATTENTIVEAssiduous.
ATTENTIVEHeedful.
ATTENTIVESolicitous
attentivefull of attention
attentivemindful observant attentive to what he is doing