Took time to go through lily garden (9)
I believe the answer is:
arboretum
'garden' is the definition.
(I've seen this before)
'took time to go through lily' is the wordplay.
'took' becomes 'bore' (I am not sure about this - if you are sure you should believe this answer much more).
'time' becomes 't' (abbreviation).
'to go through' means one lot of letters goes inside another.
'lily' becomes 'arum' (a type of lily).
'bore'+'t'='boret'
'boret' put within 'arum' is 'ARBORETUM'.
Can you help me to learn more?
(Other definitions for arboretum that I've seen before include "Place for cultivation of 19s" , "area with great growth" , "there's high growth" , "Botanical garden of trees" , "Collection of elders, say" .)