He gets red if a stranger addresses him (3)
I believe the answer is:
alf
'him' is the definition.
'he gets red if a stranger addresses' is the wordplay.
I cannot quite understand how this works, but
'he' could be 'al' and 'al' is found within the answer.
A single letter 'f' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for alf that I've seen before include "Boy" , "Chap" , "Garnett or Ramsey?" , "See man" , "Mr Garnett" .)