Old conveyance in a simple instrument (7)
I believe the answer is:
ocarina
'simple instrument' is the definition.
'ocarina' can be an answer for 'instrument' (ocarina is a kind of instrument). I'm not certain of the 'simple' bit.
'old conveyance in a' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'conveyance' becomes 'car' (car is a kind of conveyance).
'o'+'car'+'in'+'a'='OCARINA'
Can you help me to learn more?
(Other definitions for ocarina that I've seen before include "Egg-shaped wind instrument with finger holes" , "it's blown in pieces" , "Small egg-shaped wind instrument with holes for the fingers" , "we blow it" , "Wind instrument with a mouthpiece and finger holes" .)