Old instrument from chap's horrid contrivance (11)
I believe the answer is:
harpsichord
'old instrument' is the definition.
'harpsichord' can be an answer for 'instrument' (harpsichord is a kind of instrument). I am unsure of the 'old' bit.
'chap's horrid contrivance' is the wordplay.
'contrivance' indicates an anagram.
'chaps'+'horrid'='chapshorrid'
'chapshorrid' is an anagram of 'HARPSICHORD'.
'from' is the link.
Can you help me to learn more?
(Another definition for harpsichord that I've seen is " Early keyboard instrument".)