Gently reminds one of middle-age through naked images (6)
I believe the answer is:
nudges
'gently reminds one' is the definition.
I can't tell whether this definition defines the answer.
'middle-age through naked images' is the wordplay.
'middle' says to take the centre.
'through' is an insertion indicator (inserted letters go through the word).
'naked images' becomes 'nudes' (I can't justify this - if you can you should believe this answer much more).
The central letter of 'age' is 'g'.
'g' put within 'nudes' is 'NUDGES'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for nudges that I've seen before include "Pokes with the elbow" , "Elbows gently" , "Is jogger" , "Prods gently with the elbow" , "gentle reminders" .)