Pick up article in valley (5)
I believe the answer is:
glean
'pick up' is the definition.
(I've seen this before)
'article in valley' is the wordplay.
'article' becomes 'a' (English indefinite article).
'in' is an insertion indicator.
'valley' becomes 'glen' (glen is a kind of valley).
'a' put into 'glen' is 'GLEAN'.
(Other definitions for glean that I've seen before include "Gather remnants of corn" , "Gather, pick up" , "Pick up (information)" , "Gather (grains of information?)" , "Pull together from various sources" .)