Something a climber may be raised on (7)
I believe the answer is:
trellis
'something a climber may be raised' is the definition.
I can't judge whether this definition defines the answer.
'on' is the wordplay.
I cannot really see how this works, but
'on' could be 're' ('on' can be mean 'with reference to') and 're' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for trellis that I've seen before include "garden equipment" , "Frame for creepers" , "Garden frame or screen" , "Garden climber support" , "climbers train on it" .)