I catch parent outside nurseries (6)
I believe the answer is:
pineta
'nurseries' is the definition.
(plural of pinetum, a plantation of pine trees)
'i catch parent outside' is the wordplay.
'catch' becomes 'net' (net can mean to catch).
'parent' becomes 'pa' (pa can mean dad or father).
'outside' means one lot of letters goes inside another.
'i'+'net'='inet'
'inet' put into 'pa' is 'PINETA'.
(Other definitions for pineta that I've seen before include "Plantations of trees" , "evergreen places" , "Tree plantations" , "places timber may be sourced from" .)