Putting current into a line is no problem (6)
I believe the answer is:
facile
'putting current' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'into a line is no problem' is the wordplay.
'into' means one lot of letters goes inside another.
'a line' becomes 'file' (file is a kind of line).
'is no problem' becomes 'ac' (I can't explain this - if you can you should believe this answer much more).
'file' placed around 'ac' is 'FACILE'.
Can you help me to learn more?
(Other definitions for facile that I've seen before include "Easy but glib" , "A piece of cake" , "Arrived at without due care or effort" , "Too easily achieved, glib" , "Glib or fluent (6)" .)