Regularly plant Pinot in courtyard (5)
I believe the answer is:
patio
'courtyard' is the definition.
(a patio is an outdoor space or courtyard)
'regularly plant pinot' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'plant'+'pinot'='plantpinot'
The alternating letters of 'plantpinot' are 'PATIO'.
'in' is the link.
(Other definitions for patio that I've seen before include "Garden terrace" , "Paved eating area adjoining house" , "Spanish courtyard" , "Barbecue location?" , "inner court" .)