Managed cold inside for every reindeer active in winter (7)
I believe the answer is:
prancer
'reindeer active in winter' is the definition.
I can't judge whether this defines the answer.
'managed cold inside for every' is the wordplay.
'managed' becomes 'ran' (I've seen this in another clue).
'cold' becomes 'c' (eg on taps).
'inside' is an insertion indicator.
'for every' becomes 'per' ('per' means 'for each' or 'for every').
'ran'+'c'='ranc'
'ranc' placed within 'per' is 'PRANCER'.
Can you help me to learn more?
(Other definitions for prancer that I've seen before include "Spirited horse" , "Xmas reindeer" , "A lively horse" , "Sleigh-puller" , "One of Santa's reindeers" .)