Where bats are seen to rise (8)
I believe the answer is:
increase
'to rise' is the definition.
(I've seen this before)
'where bats are' is the wordplay.
I cannot quite see how this works, but
an anagram of 'are' is 'rea' which is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'seen' acts as a link.
Can you help me to learn more?
(Other definitions for increase that I've seen before include "Grow, add to" , "Augment or enlarge (8)." , "Get bigger" , "Grow bigger" , "Addition, growth" .)