Passionate as one can get in a garden tent (6)
I believe the answer is:
ardent
'passionate' is the definition.
(similar in meaning)
'in a garden tent' is the wordplay.
'in' says the answer is hidden in the clue.
'ARDENT' is hidden within 'garden tent'.
'as one can get' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for ardent that I've seen before include "Fiery and zealous" , "Fervid" , "Intensely devoted" , "Enthusiastic, eager" , "Loving and fiery" .)