Plant you'll find some days in a new shop (6)
I believe the answer is:
hyssop
'plant' is the definition.
(hyssop is a kind of plant)
'some days in a new shop' is the wordplay.
'some days' becomes 'ys' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'a new' is an anagram indicator.
'shop' is an anagram of 'hsop'.
'ys' placed inside 'hsop' is 'HYSSOP'.
'you'll find' acts as a link.
Can you help me to learn more?
(Other definitions for hyssop that I've seen before include "Aromatic plant" , "little blue flowers" , "Herb in the mint family" , "Aromatic herb" , "Plant with minty leaves used in cooking or as medicine" .)