Interior organs taxidermist originally stored in bottles (6)
I believe the answer is:
vitals
'interior organs' is the definition.
'vitals' can be an answer for 'organs' (I've seen this before). I am not certain of the 'interior' bit.
'taxidermist originally stored in bottles' is the wordplay.
'originally' suggests taking the first letters.
'stored in' means one lot of letters goes inside another.
'bottles' becomes 'vials' (vial is a kind of bottle).
The initial letter of 'taxidermist' is 't'.
't' put into 'vials' is 'VITALS'.
Can you help me to learn more?
(Other definitions for vitals that I've seen before include "Essential parts of body - heart, lungs, etc." , "Essential parts of body - heart, lings, brain etc" , "Organs essential for life" , "Heart, lungs, brain etc" , "Organs 21-ed for life" .)