Show always to back a certain number (6)
I believe the answer is:
reveal
'show' is the definition.
(synonyms)
'always to back a certain number' is the wordplay.
'always' becomes 'ever' (synonyms).
'to back' is a reversal indicator.
'certain number' becomes 'l' (L is an example. I am not sure about the 'certain' bit.).
'ever' back-to-front is 'reve'.
'reve'+'a'+'l'='REVEAL'
Can you help me to learn more?
(Other definitions for reveal that I've seen before include "let out" , "Expose, divulge" , "window, in part" , "Remove cover, unveil" , "Leaver (anag.)" .)