Paean, book for all to see in stock (7)
I believe the answer is:
tribute
'paean' is the definition.
(thesaurus)
'book for all to see in stock' is the wordplay.
'book' becomes 'b' (abbreviation for book).
'for all' becomes 'U' (Universal film certificate - suitable for all).
'to see in' means one lot of letters goes inside another.
'stock' becomes 'trite' (I've seen this before).
'b'+'u'='bu'
'bu' put into 'trite' is 'TRIBUTE'.
(Other definitions for tribute that I've seen before include "expression of approval" , "Payment to overlord" , "Commendation; homage" , "Act / words of approbation" , "Statement of gratitude and acknowledgment" .)