Available for touching base on Friday (4)
I believe the answer is:
free
'available' is the definition.
('free' can be similar in meaning to 'available')
'touching base on friday' is the wordplay.
'touching' becomes 're' (I've seen this in other clues**).
'base' becomes 'e' (I've seen this in other clues).
'on' says to put letters next to each other.
'friday' becomes 'f'.
're'+'e'='ree'
'ree' after 'f' is 'FREE'.
'for' acts as a link.
(Other definitions for free that I've seen before include "At liberty" , "Not incurring charge" , "Generous, rid, available" , "Liberal" , "Not busy" .)