As an alternative, duck to the right (5)
I believe the answer is:
other
'as' is the definition.
Both the answer and definition are adverbs. Maybe there's an association between them I don't understand?
'an alternative duck to the right' is the wordplay.
'an alternative' is an anagram indicator.
'duck' becomes 'o' (resembles zero - 'duck' in cricket).
'to' means one lot of letters go next to another (I've seen this in other clues).
'right' becomes 'r' (common abbreviation).
'o' after 'the' is 'theo'.
'theo' anagrammed gives 'othe'.
'othe'+'r'='OTHER'
Can you help me to learn more?
(Other definitions for other that I've seen before include "Different, not the same one or this one" , "Different, alternative" , "Different, disparate" , "Different; additional" , "Alternate; additional" .)