A riser possibly seen in range of peaks (6)
I believe the answer is:
sierra
'range of peaks' is the definition.
'sierra' can be an answer for 'range' (I've seen this before). I am unsure of the 'of peaks' bit.
'a riser possibly' is the wordplay.
'possibly' is an anagram indicator.
'a'+'riser'='ariser'
'ariser' with letters rearranged gives 'SIERRA'.
'seen in' is the link.
Can you help me to learn more?
(Other definitions for sierra that I've seen before include "Mountain range in Spanish-speaking countries" , "A Spanish mountain chain (6)" , "Long jagged mountain chain" , "Model of car from Ford" , "International codeword" .)