Attentive to wrong trap (4)
I believe the answer is:
rapt
'attentive' is the definition.
('rapt' can be similar in meaning to 'attentive')
'wrong trap' is the wordplay.
'wrong' indicates anagramming the letters.
'trap' anagrammed gives 'RAPT'.
'to' is the link.
(Other definitions for rapt that I've seen before include "Fully intent, fascinated" , "Spellbound, enthralled" , "Enchanted in part" , "Absorbed, fascinated" , "Enthralled, captivated" .)