Jumbo, say, tender daughter has filled in style (9)
I believe the answer is:
pachyderm
'jumbo' is the definition.
(I've seen this before)
'tender daughter has filled in style' is the wordplay.
I cannot really understand how this works, but
'tender' could be 'achy' (I've seen this in another clue) and 'achy' is located in the answer.
'daughter' could be 'd' (genealogical abbreviation) and 'd' is found within the answer.
'style' could be 'perm' (hair style) and 'perm' is located in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
'say' acts as a link.
Can you help me to learn more?
(Other definitions for pachyderm that I've seen before include "Rhino or hippo, say?" , "Thick-skinned mammal like elephant" , "Elephant, hippo etc" , "jumbo" , "Large hoofed animal with a very thick skin" .)