Pitch a second Plath novel (7)
I believe the answer is:
asphalt
'pitch' is the definition.
(I've seen this before)
'a second plath novel' is the wordplay.
'second' becomes 's' (common abbreviation).
'novel' indicates an anagram.
'plath' anagrammed gives 'phalt'.
'a'+'s'+'phalt'='ASPHALT'
(Other definitions for asphalt that I've seen before include "Material for road surfacing etc" , "Bituminous road dressing" , "Substance used in roofing and paving" , "surface of path" , "Dark natural pitch" .)