Oddly miss old Islay, upland island for hopping (4,3)
I believe the answer is:
lily pad
'island for hopping' is the definition.
I can't judge whether this defines the answer.
'oddly miss old islay upland' is the wordplay.
'oddly miss' means one should take alternating letters (I've seen 'oddly missing' mean this).
'old'+'islay'+'upland'='oldislayupland'
The alternate letters of 'oldislayupland' are 'LILY PAD'.
Can you help me to learn more?
(Other definitions for lily pad that I've seen before include "Leaf of flowering aquatic plant" , "Pond feature upon which a frog may sit" , "Frog's seat on a pond?" , "Leaf floating on water" , "One floating" .)