Earl with enormous clothing to praise (5)
I believe the answer is:
extol
'praise' is the definition.
(extolling is a kind of praising)
'earl with enormous clothing to' is the wordplay.
'earl' becomes 'e'.
'with enormous' becomes 'xl' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'clothing' means one lot of letters goes inside another (some letters cover up or clothe others).
'xl' placed around 'to' is 'xtol'.
'e'+'xtol'='EXTOL'
Can you help me to learn more?
(Other definitions for extol that I've seen before include "Cry up" , "Praise highly, laud" , "Highly commend" , "Applaud" , "Acclaim" .)