Chap I had to make nervous (5)
I believe the answer is:
timid
'nervous' is the definition.
(I've seen this before)
'chap i had' is the wordplay.
'chap' becomes 'tim' (short for Timothy).
'i had' becomes 'id' (common contraction).
'tim'+'id'='TIMID'
'to make' is the link.
(Other definitions for timid that I've seen before include "Bashful or fearful" , "Easily frightened" , "Lacking in confidence" , "Not assertive, retiring" , "Shrinking" .)