Can it make you think how wild a steer can be? (6)
I believe the answer is:
teaser
'can it make you think how wild' is the definition.
I can't judge whether this defines the answer.
'a steer can be?' is the wordplay.
'can be?' indicates an anagram (I've seen 'can be' mean this).
'a'+'steer'='asteer'
'asteer' is an anagram of 'TEASER'.
Can you help me to learn more?
(Other definitions for teaser that I've seen before include "Puzzling question or gentle goader" , "Tricky question; intriguing preliminary advert" , "A difficult problem of Teresa" , "inducement" , "One who pulls someone's leg" .)