Bearing mother! It's just a fluid injection! (5)
I believe the answer is:
enema
'injection' is the definition.
(I've seen this before)
'bearing mother it's just a fluid' is the wordplay.
I cannot really see how this works, but
'bearing' could be 'ne' and 'ne' is present in the answer.
'mother' could be 'ma' (ma can mean mother) and 'ma' is found in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for enema that I've seen before include "Fluid injected rectally" , "Bowel evacuator" , "Medical liquid introduced anally" , "The bottom line in medical treatment?" , "Procedure for vacating the bowels" .)