Henry oddly abrupt delivering musical instrument (4)
I believe the answer is:
harp
'musical instrument' is the definition.
(harp is a kind of musical instrument)
'henry oddly abrupt' is the wordplay.
'henry' becomes 'h' (symbol for the unit of electrical inductance).
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternate letters of 'abrupt' are 'arp'.
'h'+'arp'='HARP'
'delivering' is the link.
(Other definitions for harp that I've seen before include "David's instrument" , "Heavenly instrument?" , "Lyre" , "Instrument (for angels?)" , "Emblem of Ireland" .)