Study long, absorbing Time article about teeth (6)
I believe the answer is:
dental
'about teeth' is the definition.
(I know this)
'study long absorbing time article' is the wordplay.
'study' becomes 'den' (term for a study or office).
'long' becomes 'l'.
'absorbing' means one lot of letters goes inside another.
'time' becomes 't' (abbreviation).
'article' becomes 'a' (the indefinite article in English).
'den'+'l'='denl'
't'+'a'='ta'
'denl' enclosing 'ta' is 'DENTAL'.
(Other definitions for dental that I've seen before include "Concerning teeth" , "sort of surgeon" , "concerned with choppers" , "Pertaining to teeth" , "Relating to teeth" .)