Check girl I'm seeing! (8)
I believe the answer is:
validate
'check' is the definition.
(thesaurus)
'girl i'm seeing' is the wordplay.
I cannot really see how this works, but
'girl' could be 'valida' and 'valida' is located in the answer.
The remaining letters 'te' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for validate that I've seen before include "Corroborate" , "Confirm or authenticate" , "Declare legally acceptable" , "Prove" , "Confirm correctness of" .)