Cramp from reading Tenerife novel outside (9)
I believe the answer is:
interfere
'cramp' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how one could define the other.
'reading tenerife novel outside' is the wordplay.
'reading' becomes 'r' (one of the traditional three R's of education).
'novel' indicates an anagram (letters in a new or novel order).
'outside' indicates putting letters inside.
'tenerife' with letters rearranged gives 'intefere'.
'r' going within 'intefere' is 'INTERFERE'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for interfere that I've seen before include "Poke one's nose in" , "Intruder does" , "Attempt" , "Stick one's oar in" , "Obstruct, pry" .)