Amphibians with modern, non-standard parts (5)
I believe the answer is:
newts
'amphibians' is the definition.
(newt is a kind of amphibian)
'modern non-standard parts' is the wordplay.
'modern' becomes 'new' ('new' is associated in meaning with 'modern').
'non' is a deletion indicator.
'standard' becomes 'par' (I've seen this before).
'parts' with 'par' taken away is 'ts'.
'new'+'ts'='NEWTS'
'with' is the link.
(Other definitions for newts that I've seen before include "creatures" , "Kind of water lizards or efts" , "Small amphibians, efts" .)