Big range also with three ovens at the bottom (5)
I believe the answer is:
andes
'big range' is the definition.
(I've seen this in another clue)
'with three ovens at the bottom' is the wordplay.
'with' becomes 'and'.
'at the bottom' indicates one should take the final letters (in a down clue, the letter at the bottom).
The final letters of 'three ovens' are 'es'.
'and'+'es'='ANDES'
'also' acts as a link.
(Other definitions for andes that I've seen before include "A geographical feature" , "Mountain range in South America" , "Mountains of 6 dn" , "Danes seen in mountains" , "Aconcagua the highest in this range" .)