Volunteers turning up, here and now (2,7)
I believe the answer is:
at present
'now' is the definition.
('at present' can be a synonym of 'now')
'volunteers turning up here' is the wordplay.
'volunteers' becomes 'ta' (abbreviation for Territorial Army).
'turning up' says the letters should be written in reverse.
'here' becomes 'present' ('present' can be similar in meaning to 'here').
'ta' reversed gives 'at'.
'at'+'present'='AT PRESENT'
'and' is the link.
(Other definitions for at present that I've seen before include "As of now, during this time" , "temporarily" , "Currently, right now" , "Nowadays" , "these days" .)