Leaves Pisa occasionally in new Golf heading for Empoli (7)
I believe the answer is:
foliage
'leaves' is the definition.
(I've seen this in another clue)
'pisa occasionally in new golf heading for empoli' is the wordplay.
'occasionally' means one should take alternating letters (letters taken at regular intervals or occasions).
'in' indicates putting letters inside.
'new' indicates an anagram.
'heading for' indicates taking the first letters.
The initial letter of 'empoli' is 'e'.
The alternating letters of 'pisa' are 'ia'.
'golf' is an anagram of 'folg'.
'ia' going within 'folg' is 'foliag'.
'foliag'+'e'='FOLIAGE'
(Other definitions for foliage that I've seen before include "Green leaves" , "Cluster of leaves" , "Mass of leaves" , "Plant leaves collectively" , "Greenery, leaves of trees or plants" .)