Puts off disturbing first wild steer (6)
I believe the answer is:
deters
'puts off' is the definition.
(I've seen this before)
'disturbing first wild steer' is the wordplay.
'disturbing first' becomes 'd' (1st letter of 'disturbing').
'wild' indicates anagramming the letters.
'steer' anagrammed gives 'eters'.
'd'+'eters'='DETERS'
(Other definitions for deters that I've seen before include "Discourages or hinders" , "Discourages, dissuades" , "Discourages or prevents from doing something" , "is discouraging" , "Persuades or discourages from doing" .)