Strong garden tool holds (6)
I believe the answer is:
ardent
'strong' is the definition.
(thesaurus)
'garden tool holds' is the wordplay.
'holds' indicates a hidden word.
'ARDENT' is hidden in the letters of 'garden tool'.
(Other definitions for ardent that I've seen before include "Intensely devoted" , "Ranted, being impassioned" , "Passionate and glowing" , "Fiery and zealous" , "Having great warmth of feeling like a lover" .)