A blue novel about endless sex apt to be drawn on? (7)
I believe the answer is:
useable
'apt to be drawn on?' is the definition.
I can't judge whether this definition defines the answer.
'a blue novel about endless sex' is the wordplay.
'novel' is an anagram indicator (letters in a new or novel order).
'about' is an insertion indicator.
'endless' means to remove the last letter.
'a'+'blue'='ablue'
'ablue' anagrammed gives 'uable'.
'sex' with its last letter removed is 'se'.
'uable' going around 'se' is 'USEABLE'.
Can you help me to learn more?
(Another definition for useable that I've seen is " deployed".)