Becoming aware Dan is out of gin and tonic (8)
I believe the answer is:
noticing
'becoming aware dan is out' is the definition.
I can't tell whether this definition defines the answer.
'of gin and tonic' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'and' means one lot of letters go next to another.
'gin' after 'tonic' is 'tonicgin'.
'tonicgin' is an anagram of 'NOTICING'.
Can you help me to learn more?
(Other definitions for noticing that I've seen before include "Becoming aware of" , "Seeing, detecting" , "Spotting" , "Perceiving" , "Observing" .)