A penny dreadful about soldiers – one from a range (8)
I believe the answer is:
pyrenean
'one from a range' is the definition.
The definition suggests an adjective which matches the answer.
'a penny dreadful about soldiers' is the wordplay.
'dreadful' is an anagram indicator.
'about' means one lot of letters goes inside another.
'soldiers' becomes 'RE' (Royal Engineers).
'a'+'penny'='apenny'
'apenny' with letters rearranged gives 'pynean'.
'pynean' placed around 're' is 'PYRENEAN'.
Can you help me to learn more?
(Other definitions for pyrenean that I've seen before include "Of the French-Spanish mountain range" , "Relating to range between France and Spain" , "Basque, perhaps" , "mountains" .)