Father always more able to do as he will? (5)
I believe the answer is:
freer
'able to do as he will?' is the definition.
The definition suggests a singular noun but the answer is not.
'father always more' is the wordplay.
'father' becomes 'fr' (abbreviation as in a priest's title).
'always' becomes 'eer' (poetic way of saying ever).
'more' means one lot of letters go next to another (some letters added to the previous ones).
'fr'+'eer'='FREER'
Can you help me to learn more?
(Other definitions for freer that I've seen before include "less inhibited" , "More at liberty, less restrained" , "Less restricted" , "Less constrained" .)