Crazy about a small article at the top of the paper
I believe the answer is:
masthead
'top of the paper' is the definition.
'masthead' can be an answer for 'top' (masthead is a kind of top). I'm unsure of the 'of the paper' bit.
'crazy about a small article at the' is the wordplay.
'crazy' becomes 'mad' ('mad' can be a synonym of 'crazy'**).
'about' is an insertion indicator.
'a small' becomes 's' (abbreviation - e.g. clothes size).
'article' becomes 'a' (indefinite article).
'at' means one lot of letters go next to another (I've seen this in other clues).
'a' after 'the' is 'thea'.
's'+'thea'='sthea'
'mad' going around 'sthea' is 'MASTHEAD'.
Can you help me to learn more?
(Other definitions for masthead that I've seen before include "Times title here?" , "Top of pole" , "Printed title of newspaper or magazine" , "Highest part of sailing ship" , "Heading with name of newspaper" .)