At times back in love, really get mushy about love (5,2,5)
I believe the answer is:
every so often
'at times' is the definition.
(I've seen this in another clue)
'love really get mushy about love' is the wordplay.
'love really' becomes 'every' (I can't explain this - if you can you should believe this answer much more).
'get mushy' becomes 'soften' (I've seen this in another clue).
'about' is an insertion indicator.
'love' becomes 'o' (love means zero in tennis).
'soften' going around 'o' is 'sooften'.
'every'+'sooften'='EVERY SO OFTEN'
'back in' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for every so often that I've seen before include "Occasionally" , "At intervals" .)