Domineering because too productive? (11)
I believe the answer is:
overbearing
'domineering' is the definition.
(similar in meaning)
'too productive?' is the wordplay.
'too' becomes 'over' (I am not sure about this - if you are sure you should believe this answer much more).
'productive?' becomes 'bearing' ('bearing' can be similar in meaning to 'productive').
'over'+'bearing'='OVERBEARING'
'because' acts as a link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for overbearing that I've seen before include "Arrogant" , "Officious" , "Unpleasantly dominating" , "Imperious" , "High-handed" .)