Fellow skirting front of pretty tree (5)
I believe the answer is:
maple
'tree' is the definition.
(maple is a kind of tree)
'fellow skirting front of pretty' is the wordplay.
'fellow' becomes 'male' (I've seen this before**).
'skirting' indicates putting letters inside.
'front of' suggests taking the first letters.
The first letter of 'pretty' is 'p'.
'male' going around 'p' is 'MAPLE'.
(Other definitions for maple that I've seen before include "Canadian flag leaf" , "Tree associated with Canada" , "Source of syrup" , "Syrup-producing tree" , "Canadian national tree" .)