Continuing to draw on plan (6)
I believe the answer is:
onward
'continuing' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
'draw on plan' is the wordplay.
'plan' indicates an anagram (plan can mean organise).
'draw'+'on'='drawon'
'drawon' anagrammed gives 'ONWARD'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for onward that I've seen before include "Advanced" , "In front" , "Ahead" , "Forward, like Christian soldiers" , "Advance, Christian soldiers, marching as to war" .)