Instructed a boy to get out of the rain (7)
I believe the answer is:
trained
'instructed' is the definition.
(training is a kind of instructing)
'a boy to get out of the rain' is the wordplay.
'a boy' becomes 'Ed' (short for Edward).
'to' says to put letters next to each other (I've seen this in other clues).
'get out of' becomes 't' (I can't justify this - if you can you should give a lot more credence to this answer).
't'+'rain'='train'
'ed' put after 'train' is 'TRAINED'.
Can you help me to learn more?
(Other definitions for trained that I've seen before include "Prepared for a task or career" , "Schooled" , "ran along track" , "Taught (a skill)" , "Coached" .)