As an alternative, duck to the right (5)
I believe the answer is:
other
'as' is the definition.
Both the definition and answer are adverbs. Maybe you can see a link between them that I can't see?
'alternative duck to the right' is the wordplay.
'alternative' indicates anagramming the letters (an alternative ordering of the letters).
'duck' becomes 'o' (resembles zero - 'duck' in cricket).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'right' becomes 'r' (common abbreviation).
'o' after 'the' is 'theo'.
'theo' is an anagram of 'othe'.
'othe'+'r'='OTHER'
'an' acts as a link.
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" .)