Woods giving warning approaching second tee (6)
I believe the answer is:
forest
'woods' is the definition.
(synonyms)
'warning approaching second tee' is the wordplay.
'warning' becomes 'fore' (I've seen this in other clues).
'approaching' says to put letters next to each other.
'second' becomes 's' (common abbreviation).
'tee' becomes 't'.
'fore'+'s'+'t'='FOREST'
'giving' is the link.
(Other definitions for forest that I've seen before include "Dense woodland" , "large area covered with trees" , "Large, densely-wooded area" , "Large area of trees and undergrowth" , "green area" .)